cut-the-knot.org Website Information
Daily Unique Visits: 65,068
Daily Page Views: 390,408
Income Per Day: $781
Estimated Value: $562,320
This website is located in United States and is using following IP address 107.180.50.227. See the complete list of popular websites hosted in United States.
cut-the-knot.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.
Website cut-the-knot.org is using the following name servers:
- ns55.domaincontrol.com
- ns56.domaincontrol.com
and is probably hosted by AS-26496-GO-DADDY-COM-LLC - GoDaddy.com, LLC, US. See the full list of other websites hosted by AS-26496-GO-DADDY-COM-LLC - GoDaddy.com, LLC, US.
The highest website cut-the-knot.org position in Alexa rank database was 20530 and the lowest rank position was 999112. Current position of cut-the-knot.org in Alexa rank database is 22042.
Desktop speed score of cut-the-knot.org (83/100) is better than the results of 76.15% of other sites and shows that the page is performing great on desktop computers.
Mobile usability score of cut-the-knot.org (82/100) is better than the results of 26.06% of other sites and means that the page is mobile-friendly.
Mobile speed score of cut-the-knot.org (63/100) is better than the results of 61.76% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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cut-the-knot.org Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
cut-the-knot.org whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
Domain Name: CUT-THE-KNOT.ORG
Registry Domain ID: D79395063-LROR
Registrar WHOIS Server: whois.godaddy.com
Registrar URL: http://www.whois.godaddy.com
Updated Date: 2019-02-02T00:21:36Z
Creation Date: 2001-11-06T20:05:04Z
Registry Expiry Date: 2021-11-06T20:05:04Z
Registrar Registration Expiration Date:
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: +1.4806242505
Reseller:
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registrant Organization: Wolfram Foundation
Registrant State/Province: Illinois
Registrant Country: US
Name Server: NS55.DOMAINCONTROL.COM
Name Server: NS56.DOMAINCONTROL.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-05-03T00:07:00Z
Registry Domain ID: D79395063-LROR
Registrar WHOIS Server: whois.godaddy.com
Registrar URL: http://www.whois.godaddy.com
Updated Date: 2019-02-02T00:21:36Z
Creation Date: 2001-11-06T20:05:04Z
Registry Expiry Date: 2021-11-06T20:05:04Z
Registrar Registration Expiration Date:
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: +1.4806242505
Reseller:
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registrant Organization: Wolfram Foundation
Registrant State/Province: Illinois
Registrant Country: US
Name Server: NS55.DOMAINCONTROL.COM
Name Server: NS56.DOMAINCONTROL.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-05-03T00:07:00Z
cut-the-knot.org server information
Servers Location
cut-the-knot.org desktop page speed rank
Last tested: 2016-11-20
Desktop Speed
Medium
83/100
cut-the-knot.org Desktop Speed Test Quick Summary
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cut-the-knot.org Desktop Resource Breakdown
| Total Resources | 240 |
| Number of Hosts | 90 |
| Static Resources | 39 |
| JavaScript Resources | 59 |
| CSS Resources | 3 |
cut-the-knot.org mobile page speed rank
Last tested: 2016-11-20
Mobile Speed
Bad
63/100
cut-the-knot.org Mobile Speed Test Quick Summary
priority - 32Eliminate render-blocking JavaScript and CSS in above-the-fold content
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priority - 0Minify HTML
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cut-the-knot.org Mobile Resource Breakdown
| Total Resources | 125 |
| Number of Hosts | 46 |
| Static Resources | 85 |
| JavaScript Resources | 71 |
| CSS Resources | 7 |
cut-the-knot.org mobile page usability
Last tested: 2016-11-20
Mobile Usability
Medium
82/100
cut-the-knot.org Mobile Usability Test Quick Summary
priority - 17Size tap targets appropriately
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The tap target
<a href="/privacy.html" class="cc_more_info">See details</a> is close to 2 other tap targets.The tap target
<a href="http://www.cut…ithmetic.shtml">Arithmetic</a> and 9 others are close to other tap targets.The tap target
<a href="http://www.cut…nversion.shtml">Base Conversion</a> and 305 others are close to other tap targets.priority - 3Configure the viewport
Your page specifies a fixed-width mobile viewport. Consider using a responsive viewport to allow your page to render properly on all devices.
cut-the-knot.org HTML validation
Errors
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
Line: 1 Column: 1 - 43
"...<html xmlns="http://www.w3.org/1999/xhtml"> <head..."
"...<html xmlns="http://www.w3.org/1999/xhtml"> <head..."
Bad value “PICS-Label” for attribute “http-equiv” on element “meta”.
Line: 3 Column: 3 - 161
"...script> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.classify.org/safesurf/" L gen true for "http://www.cut-the-knot.org/" r (SS~~000 1 SS~~000 1))' /> <t..."
"...script> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.classify.org/safesurf/" L gen true for "http://www.cut-the-knot.org/" r (SS~~000 1 SS~~000 1))' /> <t..."
Bad value “pics-Label” for attribute “http-equiv” on element “meta”.
Line: 12 Column: 4 - 310
"...ls" /> <meta http-equiv="pics-Label" content='(pics-1.1 "http://www.icra.org/pics/vocabularyv03/" l gen true for "http://cut-the-knot.org" r (n 0 s 0 v 0 l 0 oa 0 ob 0 oc 0 od 0 oe 0 of 0 og 0 oh 0 c 1) gen true for "http://www.cut-the-knot.org" r (n 0 s 0 v 0 l 0 oa 0 ob 0 oc 0 od 0 oe 0 of 0 og 0 oh 0 c 1))' /> <m..."
"...ls" /> <meta http-equiv="pics-Label" content='(pics-1.1 "http://www.icra.org/pics/vocabularyv03/" l gen true for "http://cut-the-knot.org" r (n 0 s 0 v 0 l 0 oa 0 ob 0 oc 0 od 0 oe 0 of 0 og 0 oh 0 c 1) gen true for "http://www.cut-the-knot.org" r (n 0 s 0 v 0 l 0 oa 0 ob 0 oc 0 od 0 oe 0 of 0 og 0 oh 0 c 1))' /> <m..."
Bad value “revisit-after” for attribute “http-equiv” on element “meta”.
Line: 13 Column: 4 - 55
"...))' /> <meta http-equiv="revisit-after" content="1 days" /> <l..."
"...))' /> <meta http-equiv="revisit-after" content="1 days" /> <l..."
The “text” attribute on the “body” element is obsolete. Use CSS instead.
Line: 248 Column: 1 - 120
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
The “bgcolor” attribute on the “body” element is obsolete. Use CSS instead.
Line: 248 Column: 1 - 120
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
The “link” attribute on the “body” element is obsolete. Use CSS instead.
Line: 248 Column: 1 - 120
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
The “vlink” attribute on the “body” element is obsolete. Use CSS instead.
Line: 248 Column: 1 - 120
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
The “alink” attribute on the “body” element is obsolete. Use CSS instead.
Line: 248 Column: 1 - 120
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
"...t></head> <body onclick="checkForOpenMenu(event)" text="#000000" bgcolor="#FFFFFF" link="#AA0000" vlink="#8844AA" alink="#008080"> <div ..."
No “li” element in scope but a “li” end tag seen.
Line: 331 Column: 2 - 6
"...> </ul> </li> <ul ..." Line: 337 Column: 165 - 169
"...sp;</nobr></li> </ul..."
"...> </ul> </li> <ul ..." Line: 337 Column: 165 - 169
"...sp;</nobr></li> </ul..."
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Line: 337 Column: 5 - 70
"...-> <a href="https://plus.google.com/u/0/109711444617285651208/posts"><img s..."
"...-> <a href="https://plus.google.com/u/0/109711444617285651208/posts"><img s..."
Text not allowed in element “ul” in this context.
Line: 337 Column: 128 - 133
"....png"></a> ..." Line: 337 Column: 134 - 139
"...</a> ..." Line: 337 Column: 140 - 145
"...bsp; ..." Line: 337 Column: 146 - 151
"...bsp; ..." Line: 337 Column: 152 - 157
"...bsp; </nobr..."
"....png"></a> ..." Line: 337 Column: 134 - 139
"...</a> ..." Line: 337 Column: 140 - 145
"...bsp; ..." Line: 337 Column: 146 - 151
"...bsp; ..." Line: 337 Column: 152 - 157
"...bsp; </nobr..."
Stray end tag “nobr”.
Line: 337 Column: 158 - 164
"...bsp; </nobr></li> ..."
"...bsp; </nobr></li> ..."
The “align” attribute on the “h1” element is obsolete. Use CSS instead.
Line: 348 Column: 1 - 19
"...inFrame"> <h1 align="center">Intera..."
"...inFrame"> <h1 align="center">Intera..."
The “center” element is obsolete. Use CSS instead.
Line: 356 Column: 1 - 8
"...ROPER --> <center> <tabl..." Line: 1543 Column: 1 - 8
"...ROPER --> <center> <ta..." Line: 1559 Column: 1 - 8
"...</center> <center> <im..."
"...ROPER --> <center> <tabl..." Line: 1543 Column: 1 - 8
"...ROPER --> <center> <ta..." Line: 1559 Column: 1 - 8
"...</center> <center> <im..."
Attribute “bordercolor” not allowed on element “table” at this point.
Line: 357 Column: 1 - 72
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
Line: 357 Column: 1 - 72
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
Line: 357 Column: 1 - 72
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
The “border” attribute on the “table” element is obsolete. Use CSS instead.
Line: 357 Column: 1 - 72
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
"... <center> <table cellpadding="0" cellspacing="0" border="1" bordercolor="#800000"> <col ..." Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
The “width” attribute on the “col” element is obsolete. Use CSS instead.
Line: 358 Column: 73 - 17
"..."#800000"> <col width="33%"><col w..." Line: 358 Column: 18 - 34
"...dth="33%"><col width="34%"><col w..." Line: 358 Column: 35 - 51
"...dth="34%"><col width="33%"> <..."
"..."#800000"> <col width="33%"><col w..." Line: 358 Column: 18 - 34
"...dth="33%"><col width="34%"><col w..." Line: 358 Column: 35 - 51
"...dth="34%"><col width="33%"> <..."
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
Line: 361 Column: 5 - 30
"...N --> <tr> <td valign="top" class="menu"> <tabl..." Line: 793 Column: 29 - 36
"...COLUMN --> <td valign="top" class="menu"> ..." Line: 1284 Column: 28 - 36
"...COLUMN --> <td valign="top" class="menu"> ..." Line: 1438 Column: 9 - 38
"...> <tr> <td align="center" valign="top"> ..." Line: 1445 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..." Line: 1453 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..."
"...N --> <tr> <td valign="top" class="menu"> <tabl..." Line: 793 Column: 29 - 36
"...COLUMN --> <td valign="top" class="menu"> ..." Line: 1284 Column: 28 - 36
"...COLUMN --> <td valign="top" class="menu"> ..." Line: 1438 Column: 9 - 38
"...> <tr> <td align="center" valign="top"> ..." Line: 1445 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..." Line: 1453 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..."
The “width” attribute on the “table” element is obsolete. Use CSS instead.
Line: 362 Column: 1 - 61
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1288 Column: 9 - 28
"...> <table width="100%"> <tr><..."
"...s="menu"> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 795 Column: 9 - 69
"... <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr>..." Line: 1285 Column: 9 - 69
"...> <table cellpadding="5" cellspacing="0" border="0" width=100%> <tr> ..." Line: 1288 Column: 9 - 28
"...> <table width="100%"> <tr><..."
The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.
Line: 364 Column: 5 - 35
"...100%> <tr> <td bgcolor="#C5DC80" style="menu"> <a hr..." Line: 380 Column: 5 - 35
"...</tr> <tr> <td class="menu" bgcolor="#C0D4C0"> <a hr..." Line: 467 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#C0DCC5"> <a h..." Line: 501 Column: 5 - 32
"...r> <tr> <td class="menu" bgcolor="pink"> <a h..." Line: 597 Column: 5 - 32
"...r> <tr> <td class="menu" bgcolor="cyan"> <a h..." Line: 649 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#CCCCCC"> <a h..." Line: 701 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#C5FC75"> <a h..." Line: 799 Column: 5 - 35
"...00%> <tr> <td class="menu" bgcolor="#CCCC00"> <a h..." Line: 919 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#5AC8C5" color= "white"> <a h..." Line: 1031 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#C5FC75"> <a h..." Line: 1079 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#55F57C"> <a h..." Line: 1137 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#A5F5AC"> <a h..." Line: 1231 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#55C8CC"> <a h..." Line: 1287 Column: 5 - 35
"...100%> <tr> <td class="menu" bgcolor="#55F57C"> ..." Line: 1330 Column: 11 - 35
"...</tr> <tr> <td class="menu" bgcolor="#CAC885"> <a h..." Line: 1378 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#55C8CC" color= "white"> <a h..." Line: 1426 Column: 5 - 10
"...</tr> <tr> <td class="menu" align="center" bgcolor= "#C0DCC5"> <t..." Line: 1488 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#A5CACC"> <a hr..." Line: 1521 Column: 10 - 35
"... </tr><tr> <td class="menu" bgcolor="#C5DC80"> <a hr..." Line: 1570 Column: 39 - 60
"...nbsp;</td><td bgcolor="#00aaaa">626743..."
"...100%> <tr> <td bgcolor="#C5DC80" style="menu"> <a hr..." Line: 380 Column: 5 - 35
"...</tr> <tr> <td class="menu" bgcolor="#C0D4C0"> <a hr..." Line: 467 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#C0DCC5"> <a h..." Line: 501 Column: 5 - 32
"...r> <tr> <td class="menu" bgcolor="pink"> <a h..." Line: 597 Column: 5 - 32
"...r> <tr> <td class="menu" bgcolor="cyan"> <a h..." Line: 649 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#CCCCCC"> <a h..." Line: 701 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#C5FC75"> <a h..." Line: 799 Column: 5 - 35
"...00%> <tr> <td class="menu" bgcolor="#CCCC00"> <a h..." Line: 919 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#5AC8C5" color= "white"> <a h..." Line: 1031 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#C5FC75"> <a h..." Line: 1079 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#55F57C"> <a h..." Line: 1137 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#A5F5AC"> <a h..." Line: 1231 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#55C8CC"> <a h..." Line: 1287 Column: 5 - 35
"...100%> <tr> <td class="menu" bgcolor="#55F57C"> ..." Line: 1330 Column: 11 - 35
"...</tr> <tr> <td class="menu" bgcolor="#CAC885"> <a h..." Line: 1378 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#55C8CC" color= "white"> <a h..." Line: 1426 Column: 5 - 10
"...</tr> <tr> <td class="menu" align="center" bgcolor= "#C0DCC5"> <t..." Line: 1488 Column: 5 - 35
"...r> <tr> <td class="menu" bgcolor="#A5CACC"> <a hr..." Line: 1521 Column: 10 - 35
"... </tr><tr> <td class="menu" bgcolor="#C5DC80"> <a hr..." Line: 1570 Column: 39 - 60
"...nbsp;</td><td bgcolor="#00aaaa">626743..."
Attribute “color” not allowed on element “td” at this point.
Line: 919 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#5AC8C5" color= "white"> <a h..." Line: 1378 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#55C8CC" color= "white"> <a h..."
"...r> <tr> <td class="menu" bgcolor="#5AC8C5" color= "white"> <a h..." Line: 1378 Column: 5 - 8
"...r> <tr> <td class="menu" bgcolor="#55C8CC" color= "white"> <a h..."
The “align” attribute on the “td” element is obsolete. Use CSS instead.
Line: 1289 Column: 5 - 23
"...00%"> <tr><td align="center"><a hre..." Line: 1290 Column: 25 - 43
"... <tr><td align="center"> <a hr..." Line: 1426 Column: 5 - 10
"...</tr> <tr> <td class="menu" align="center" bgcolor= "#C0DCC5"> <t..." Line: 1438 Column: 9 - 38
"...> <tr> <td align="center" valign="top"> ..." Line: 1445 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..." Line: 1453 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..." Line: 1547 Column: 9 - 38
"...> <tr> <td class="menu" align="center"><em>La..." Line: 1549 Column: 114 - 38
"...?</a></td> <td class="menu" align="center"> ..."
"...00%"> <tr><td align="center"><a hre..." Line: 1290 Column: 25 - 43
"... <tr><td align="center"> <a hr..." Line: 1426 Column: 5 - 10
"...</tr> <tr> <td class="menu" align="center" bgcolor= "#C0DCC5"> <t..." Line: 1438 Column: 9 - 38
"...> <tr> <td align="center" valign="top"> ..." Line: 1445 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..." Line: 1453 Column: 9 - 12
"...> <tr> <td class="menu" align="center" valign= "top"><a hre..." Line: 1547 Column: 9 - 38
"...> <tr> <td class="menu" align="center"><em>La..." Line: 1549 Column: 114 - 38
"...?</a></td> <td class="menu" align="center"> ..."
Bad value “1” for attribute “border” on element “img”: Only “0” is a permitted zero literal.
Line: 1289 Column: 85 - 199
"...s1.shtml"><img src="./gifs/VerySmallFront.gif" width=237 height=217 alt="Let Them Count by Eli and David Bogomolny" border=1></a></..." Line: 1752 Column: 400 - 530
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=3&tp=7&d=s&c=1&vcm_acv=1.4" width="160" height="600" border="1"></a></noscript> <..."
"...s1.shtml"><img src="./gifs/VerySmallFront.gif" width=237 height=217 alt="Let Them Count by Eli and David Bogomolny" border=1></a></..." Line: 1752 Column: 400 - 530
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=3&tp=7&d=s&c=1&vcm_acv=1.4" width="160" height="600" border="1"></a></noscript> <..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 1441 Column: 21 - 67
"...et="_top"><img src= "./gifs/SchoolZone.gif" border="0" width="120" height="80" /></a></..." Line: 1560 Column: 3 - 69
"...center> <img src="./gifs/tbow_sh.gif" border="0" height="18" width="240" /> </cen..." Line: 1752 Column: 400 - 530
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=3&tp=7&d=s&c=1&vcm_acv=1.4" width="160" height="600" border="1"></a></noscript> <..." Line: 1789 Column: 400 - 529
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=1&tp=5&d=s&c=1&vcm_acv=1.4" width="728" height="90" border="1"></a></noscript> <..." Line: 1809 Column: 371 - 449
"...<noscript><img src="https://sb.scorecardresearch.com/p?c1=2&c2=20015427&cv=2.0&cj=1"/></noscrip..."
"...et="_top"><img src= "./gifs/SchoolZone.gif" border="0" width="120" height="80" /></a></..." Line: 1560 Column: 3 - 69
"...center> <img src="./gifs/tbow_sh.gif" border="0" height="18" width="240" /> </cen..." Line: 1752 Column: 400 - 530
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=3&tp=7&d=s&c=1&vcm_acv=1.4" width="160" height="600" border="1"></a></noscript> <..." Line: 1789 Column: 400 - 529
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=1&tp=5&d=s&c=1&vcm_acv=1.4" width="728" height="90" border="1"></a></noscript> <..." Line: 1809 Column: 371 - 449
"...<noscript><img src="https://sb.scorecardresearch.com/p?c1=2&c2=20015427&cv=2.0&cj=1"/></noscrip..."
The “align” attribute on the “table” element is obsolete. Use CSS instead.
Line: 1545 Column: 3 - 35
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
"...center> <table align="center" cellpadding="3" cellspacing="3" border="1" bordercolor="#800000"> <..."
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Line: 1562 Column: 1 - 17
"...</center> <p align="right"> <a hr..." Line: 1567 Column: 1 - 16
"...</a> </p> <p align="left"><font ..."
"...</center> <p align="right"> <a hr..." Line: 1567 Column: 1 - 16
"...</a> </p> <p align="left"><font ..."
The “font” element is obsolete. Use CSS instead.
Line: 1567 Column: 17 - 32
"...gn="left"><font size="-1">Copyri..."
"...gn="left"><font size="-1">Copyri..."
Stray end tag “center”.
Line: 1569 Column: 1 - 9
"...p> </div> </center> <p><t..."
"...p> </div> </center> <p><t..."
Element “table” not allowed as child of element “p” in this context. (Suppressing further errors from this subtree.)
Line: 1570 Column: 4 - 10
"...enter> <p><table><tr><t..."
"...enter> <p><table><tr><t..."
The “width” attribute on the “td” element is obsolete. Use CSS instead.
Line: 1570 Column: 15 - 27
"...table><tr><td width=10> ..."
"...table><tr><td width=10> ..."
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
Line: 1685 Column: 1 - 47
"...n.com --> <script charset="utf-8" type="text/javascript"> amzn_..."
"...n.com --> <script charset="utf-8" type="text/javascript"> amzn_..."
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
Line: 1703 Column: - 513
"......"
"......"
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
Line: 1703 Column: - 513
"......"
"......"
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Line: 1703 Column: - 513
"......"
"......"
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Line: 1703 Column: - 513
"......"
"......"
Malformed byte sequence: “a0”.
Line: 1721 Column: - 57
"......"
"......"
Bad value “_new” for attribute “target” on element “form”: Reserved keyword “new” used.
Line: 1716 Column: 1 - 101
".../script> <form action="https://www.google.com/search" method="get" onSubmit="Gsitesearch(this)" target="_new"> <!-- ..."
".../script> <form action="https://www.google.com/search" method="get" onSubmit="Gsitesearch(this)" target="_new"> <!-- ..."
Bad value “Onscroll - 459827 - 160x600 (S)” for attribute “id” on element “div”: An ID must not contain whitespace.
Line: 1764 Column: 1 - 83
"...0 (S) --> <div id="Onscroll - 459827 - 160x600 (S)" style="margin-left:-39px;margin-top:10x"></div>..."
"...0 (S) --> <div id="Onscroll - 459827 - 160x600 (S)" style="margin-left:-39px;margin-top:10x"></div>..."
Element “nobr” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Line: 1776 Column: 1 - 6
"..."header"> <nobr> <div..."
"..."header"> <nobr> <div..."
End tag “div” seen, but there were open elements.
Line: 1799 Column: 1 - 6
"... </div> </div> <sc..."
"... </div> </div> <sc..."
Unclosed element “nobr”.
Line: 1776 Column: 1 - 6
"..."header"> <nobr> <div..."
"..."header"> <nobr> <div..."
Element “nobr” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Line: 1799 Column: - 7
"...> </div> <scr..."
"...> </div> <scr..."
No space between attributes.
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"...g,DomainId.890"border="0"heigh..." Line: 1810 Column: - 624
"....890"border="0"height="1"width..." Line: 1810 Column: - 634
"...r="0"height="1"width="1"alt="Q..." Line: 1810 Column: - 643
"...ht="1"width="1"alt="Quantcast"..."
"...g,DomainId.890"border="0"heigh..." Line: 1810 Column: - 624
"....890"border="0"height="1"width..." Line: 1810 Column: - 634
"...r="0"height="1"width="1"alt="Q..." Line: 1810 Column: - 643
"...ht="1"width="1"alt="Quantcast"..."
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Line: 1811 Column: 1 - 59
"...st tag--> <script type='text/javascript' style='display:none;' async> __ez...."
"...st tag--> <script type='text/javascript' style='display:none;' async> __ez...."
End tag for “body” seen, but there were unclosed elements.
Line: 1815 Column: 1 - 7
"...</script> </body> </htm..."
"...</script> </body> </htm..."
Warnings
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Line: 61 Column: 1 - 102
"...lesheet"> <script language="JavaScript" type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.min.js"></scri..." Line: 1550 Column: 9 - 61
"...> <script language="JavaScript" type="text/javascript"> //<![..." Line: 1576 Column: 1 - 77
"...t=100%"> <script type="text/javascript" language="JavaScript" src="/js/BookmarkIt.js"></scri..."
"...lesheet"> <script language="JavaScript" type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.min.js"></scri..." Line: 1550 Column: 9 - 61
"...> <script language="JavaScript" type="text/javascript"> //<![..." Line: 1576 Column: 1 - 77
"...t=100%"> <script type="text/javascript" language="JavaScript" src="/js/BookmarkIt.js"></scri..."
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Line: 1289 Column: 85 - 199
"...s1.shtml"><img src="./gifs/VerySmallFront.gif" width=237 height=217 alt="Let Them Count by Eli and David Bogomolny" border=1></a></..." Line: 1291 Column: 71 - 190
"...10575469"><img src="gifs/BuyLulu.gif" width=122 height=41 border="0" alt="Support independent publishing: Buy this book on Lulu."></a><b..." Line: 1441 Column: 21 - 67
"...et="_top"><img src= "./gifs/SchoolZone.gif" border="0" width="120" height="80" /></a></..." Line: 1447 Column: 7 - 19
"...l"> <img src="./gifs/2003sm_web_awds.gif" width=90 height=80 alt="Scientific American 2003 Sci/Tech Web Awards" border="0" /></a></..." Line: 1459 Column: 7 - 109
"..."> <img src= "./gifs/MERLOT-classics-2004.gif" width="63" height="63" alt="MERLOT Classics Award 2004" border="0" /></a></..." Line: 1560 Column: 3 - 69
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"...s1.shtml"><img src="./gifs/VerySmallFront.gif" width=237 height=217 alt="Let Them Count by Eli and David Bogomolny" border=1></a></..." Line: 1291 Column: 71 - 190
"...10575469"><img src="gifs/BuyLulu.gif" width=122 height=41 border="0" alt="Support independent publishing: Buy this book on Lulu."></a><b..." Line: 1441 Column: 21 - 67
"...et="_top"><img src= "./gifs/SchoolZone.gif" border="0" width="120" height="80" /></a></..." Line: 1447 Column: 7 - 19
"...l"> <img src="./gifs/2003sm_web_awds.gif" width=90 height=80 alt="Scientific American 2003 Sci/Tech Web Awards" border="0" /></a></..." Line: 1459 Column: 7 - 109
"..."> <img src= "./gifs/MERLOT-classics-2004.gif" width="63" height="63" alt="MERLOT Classics Award 2004" border="0" /></a></..." Line: 1560 Column: 3 - 69
"...center> <img src="./gifs/tbow_sh.gif" border="0" height="18" width="240" /> </cen..." Line: 1752 Column: 400 - 530
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"...bsp; <img src="/gifs/NewLogoOpal.gif" width=96 height=92 border=0 alt="Cut the knot: learn to enjoy mathematics"></a> <..." Line: 1789 Column: 400 - 529
"...nk"><img src="https://secure.fastclick.net/w/get.media?sid=2853&m=1&tp=5&d=s&c=1&vcm_acv=1.4" width="728" height="90" border="1"></a></noscript> <..." Line: 1810 Column: 511 - 659
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The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Line: 1609 Column: 1 - 17
".../script> <a name="spotim"></a> <..."
".../script> <a name="spotim"></a> <..."
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cut-the-knot.org Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
cut-the-knot.org TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.