cut-the-knot.org ▷ Interactive Mathematics Miscellany and Puzzles

Quick Summary

Online Status

Online

Server IP address resolved: Yes
Http response code: 200
Response time: 0.23 sec.
Last Checked: 11/14/2024

Cut-the-knot.org traffic volume is 6,826 unique daily visitors and their 8,873 pageviews. The web value rate of cut-the-knot.org is 159,344 USD. Each visitor makes around 1.39 page views on average.

By Alexa's traffic estimates cut-the-knot.org placed at 19,635 position over the world, while the largest amount of its visitors comes from United States, where it takes 35,698 place.

Perfect for cut-the-knot.org that their data center (provided by company company GO-DADDY-COM-LLC, US) is located in United States, as that empowers most of the visitors to reduce the page load time. See the list of other web pages hosted by GO-DADDY-COM-LLC, US.

Cut-the-knot.org registered under .ORG top-level domain. Check other websites in .ORG zone.

The last verification results, performed on (October 10, 2024) cut-the-knot.org show that cut-the-knot.org has an expired SSL certificate issued by GoDaddy.com, Inc. (expired on November 12, 2024). Click “Refresh” button for SSL Information at the Safety Information section. Check the list of websites using SSL certificates issued by GoDaddy.com, Inc..

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust cut-the-knot.org is pretty a safe domain.

Relying Google MobileFriendly test cut-the-knot.org is well optimized for mobile and tablet devices.

Cut-the-knot.org General Information

Global Rank

83,151

Average Load Time

2.11sec

Links In Count

2,041

Website Value

$148,920

Audience Geography. Where are cut-the-knot.org visitors located?

Country	Visitors
United States US	36.8%
India IN	20.1%
Canada CA	5.2%
United Kingdom GB	3.5%
Philippines PH	2.8%
Finland FI	2.2%
Pakistan PK	1.9%
Nigeria NG	1.3%
Netherlands NL	1.2%
Other	24.9%

Country	Pageviews
United States US	31.2%
India IN	18.2%
Finland FI	14.3%
United Kingdom GB	4.3%
Nigeria NG	4.1%
Canada CA	3.8%
Philippines PH	2.4%
Pakistan PK	1.3%
Malaysia MY	0.8%
Other	19.3%

Country	Rank
Finland FI	7248
Philippines PH	10688
Sri Lanka LK	15103
Nigeria NG	19684
India IN	20767
Pakistan PK	27274
Canada CA	28044
Singapore SG	34969
Azerbaijan AZ	35340
United States US	35698
Malaysia MY	40574
South Africa ZA	50371

Where do visitors go on cut-the-knot.org?

Subdomain	Pageviews
cut-the-knot.org	99.84%
other	0.16%

Subdomain	Pageviews per User
cut-the-knot.org	1.4

Subdomain	Reach
cut-the-knot.org	99.78%

How popular is cut-the-knot.org?

Period	Global Rank	Global Rank Delta
past 3 months	83151	-11246
past month	78356	2796
past week	82513	4233
yesterday	159696	21016

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	133242	-1534	38	2%	1.3	-18.01%
30	120880	-4680	43	5%	1.4	10%
7	141136	32399	37	-27.3%	1.2	-33.51%
1	261173	55313	18	-24.75%	1	-13.33%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	68157	-14829	11	25%
30	66192	4727	11	-6.626%
7	66522	-5276	11	10%
1	138828	13248	5	-13.57%

Cut-the-knot.org Safety Information

Overview

Last Updated: 11/14/2024

Overall result - cut-the-knot.org is safe.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/22/2024

cut-the-knot.org is safe.

Norton ConnectSafe evaluates cut-the-knot.org for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 02/13/2019

cut-the-knot.org is safe.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

cut-the-knot.org is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 02/22/2021

cut-the-knot.org is safe.

McAfee assesses cut-the-knot.org for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze cut-the-knot.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/09/2019

cut-the-knot.org child safety is very good.

The WOT calculates reputation of the cut-the-knot.org. This reputation system receives ratings from users and information from third-party sources, assesses the cut-the-knot.org for safety features and confirms, whether cut-the-knot.org is suitable for children.

SSL Information

SSL Checker Tool

Domain	cut-the-knot.org
Issuer Organization	GoDaddy.com, Inc.
Issuer	Go Daddy Secure Certificate Authority - G2
Algorithm	RSA-SHA256
Valid form	10/12/2023
Expiration	11/12/2024
Signed	Certificate is not self signed
Additional Domains	cut-the-knot.org www.cut-the-knot.org

Cut-the-knot.org Server Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 400754
ASN Title: GO-DADDY-COM-LLC, US

Last Update: 07/19/2024

ASN Whois

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2023, American Registry for Internet Numbers, Ltd.
#

ASNumber: 400746 - 400755
ASName: GO-DADDY-COM-LLC
ASHandle: AS400746
RegDate: 2022-05-27
Updated: 2022-05-27
Ref: https://rdap.arin.net/registry/autnum/400746

OrgName: GoDaddy.com, LLC
OrgId: GODAD
Address: 2155 E GoDaddy Way
City: Tempe
StateProv: AZ
PostalCode: 85284
Country: US
RegDate: 2007-06-01
Updated: 2022-08-02
Comment: Please send abuse complaints to abuse@godaddy.com
Ref: https://rdap.arin.net/registry/entity/GODAD

OrgNOCHandle: NOC124-ARIN
OrgNOCName: Network Operations Center
OrgNOCPhone: +1-480-505-8809
OrgNOCEmail: noc@godaddy.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC124-ARIN

OrgTechHandle: NOC124-ARIN
OrgTechName: Network Operations Center
OrgTechPhone: +1-480-505-8809
OrgTechEmail: noc@godaddy.com
OrgTechRef: https://rdap.arin.net/registry/entity/NOC124-ARIN

OrgAbuseHandle: ABUSE51-ARIN
OrgAbuseName: Abuse Department
OrgAbusePhone: +1-480-624-2505
OrgAbuseEmail: abuse@godaddy.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE51-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2023, American Registry for Internet Numbers, Ltd.
#

Cut-the-knot.org Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

Domain Name: cut-the-knot.org
Registry Domain ID: 5fa5db41ae4844d0bcc0cd0c9e379083-LROR
Registrar WHOIS Server: http://whois.godaddy.com
Registrar URL: http://www.whois.godaddy.com
Updated Date: 2024-07-27T12:41:51Z
Creation Date: 2001-11-06T20:05:04Z
Registry Expiry Date: 2025-11-06T20:05:04Z
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: +1.4806242505
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
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Domains By Proxy, LLC
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: Arizona
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
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: 2024-09-20T16:22:45Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
cut-the-knot.org	107.180.50.227	10800

Host	MX Record	Priority	TTL

Host	NS Record	TTL
cut-the-knot.org	ns55.domaincontrol.com	3600
cut-the-knot.org	ns56.domaincontrol.com	3600

Host	TXT Record	TTL

ns55.domaincontrol.com
TTL: 3600
Email address: dns.jomax.net
Serial: 2018120301
Refresh: 28800
Retry: 7200
Expire: 604800
Minimum: 600

Cut-the-knot.org HTML Validation

HTML Validation Tool

Errors

Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.

Bad value “PICS-Label” for attribute “http-equiv” on element “meta”.

Bad value “pics-Label” for attribute “http-equiv” on element “meta”.

Bad value “revisit-after” for attribute “http-equiv” on element “meta”.

The “text” attribute on the “body” element is obsolete. Use CSS instead.

The “bgcolor” attribute on the “body” element is obsolete. Use CSS instead.

The “link” attribute on the “body” element is obsolete. Use CSS instead.

The “vlink” attribute on the “body” element is obsolete. Use CSS instead.

The “alink” attribute on the “body” element is obsolete. Use CSS instead.

No “li” element in scope but a “li” end tag seen.

Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Text not allowed in element “ul” in this context.

Stray end tag “nobr”.

The “align” attribute on the “h1” element is obsolete. Use CSS instead.

The “center” element is obsolete. Use CSS instead.

Attribute “bordercolor” not allowed on element “table” at this point.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “width” attribute on the “col” element is obsolete. Use CSS instead.

The “valign” attribute on the “td” element is obsolete. Use CSS instead.

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.

Attribute “color” not allowed on element “td” at this point.

The “align” attribute on the “td” element is obsolete. Use CSS instead.

Bad value “1” for attribute “border” on element “img”: Only “0” is a permitted zero literal.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

The “align” attribute on the “table” element is obsolete. Use CSS instead.

The “align” attribute on the “p” element is obsolete. Use CSS instead.

The “font” element is obsolete. Use CSS instead.

Stray end tag “center”.

Element “table” not allowed as child of element “p” in this context. (Suppressing further errors from this subtree.)

The “width” attribute on the “td” element is obsolete. Use CSS instead.

Element “script” must not have attribute “charset” unless attribute “src” is also specified.

The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.

The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.

The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

Malformed byte sequence: “a0”.

Bad value “_new” for attribute “target” on element “form”: Reserved keyword “new” used.

Bad value “Onscroll - 459827 - 160x600 (S)” for attribute “id” on element “div”: An ID must not contain whitespace.

Element “nobr” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)

End tag “div” seen, but there were open elements.

Unclosed element “nobr”.

Element “nobr” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

No space between attributes.

Element “script” must not have attribute “async” unless attribute “src” is also specified.

End tag for “body” seen, but there were unclosed elements.

Warnings

The “language” attribute on the “script” element is obsolete. You can safely omit it.

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

Cut-the-knot.org Desktop Insights

Last tested: 11/20/2016

Desktop

Desktop Speed

83%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Enable compression

Leverage browser caching

Minify JavaScript

Minify HTML

Optimize images

Desktop Resource Breakdown

Total Resources	240
Number of Hosts	90
Static Resources	39
JavaScript Resources	59
CSS Resources	3

Cut-the-knot.org Mobile Insights

Last tested: 11/20/2016

Mobile

Mobile Usability

82%

Size tap targets appropriately

Configure the viewport

Mobile Speed

63%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Minify JavaScript

Optimize images

Minify CSS

Enable compression

Minify HTML

Mobile Resource Breakdown

Total Resources	125
Number of Hosts	46
Static Resources	85
JavaScript Resources	71
CSS Resources	7

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Cut-the-knot.org Interactive Mathematics Miscellany and Puzzles

An encyclopedic collection of math resources for all grades. Arithmetic games, problems, puzzles, and articles

Quick Summary

Cut-the-knot.org General Information

Cut-the-knot.org Safety Information

Cut-the-knot.org Server Information

Cut-the-knot.org Domain Name Information

Cut-the-knot.org HTML Validation

Cut-the-knot.org Desktop Insights

Cut-the-knot.org Mobile Insights

Cut-the-knot.org Nearest Competitors

Cut-the-knot.org Typos