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

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

Cut-the-knot.org Overview

Cut-the-knot.org is a valuable website for students of maths of all levels, providing a wide range of arithmetic games, puzzles, problems, and articles. The site is hosted by GoDaddy.com, LLC, and has a top-level domain of .ORG, indicating its non-profit status. The website has an impressive 6379 unique users per day and 8292.7 pageviews, making it a popular resource for maths enthusiasts worldwide. A Site value of 148,920 US dollars attests to its extensive content and user-friendliness.

The layout and structure of the site make it user-friendly. The homepage integrates all the essential elements, including the logo, the navigation menu, and a search bar. These features help users easily locate the desired content without much fuss. Additionally, the homepage displays featured articles and games, attracting users to explore the complete range of resources the site has to offer.

Moving on to the individual pages of the site, they are well-organized, with the content presented clearly and coherently. The use of visual aids such as images and diagrams aids understanding and enhances the overall user experience. An overall color scheme of white with blue fonts and headings creates a clean and elegant look that complements the complexity of mathematics.

The website has an SSL certificate issued by GoDaddy.com, Inc. This signifies that the site is secure and assures users that their data is encrypted when making any transactions or entering personal details. This enhances the overall trustworthiness of the site, making it a safe place for users to browse and explore.

The content of the site is entirely family-friendly, making it a valuable resource for parents as well as their children. Its vast range of puzzles and games cater to all ages, ensuring users remain engaged and active on the site. In terms of PageSpeed Insights, the website scores an average 63, indicating the website's performance is in line with industry standards.

In summary, Cut-the-knot.org is an encyclopedic collection of math resources that strikes the perfect balance between mathematics education and entertainment. The website is user-friendly, secure, and entirely family-friendly. Its impressive metrics and top-level domain attest to its standing as a valuable resource, making it a worthwhile asset for anyone with an interest in mathematics.

Cut-the-knot.org Rank Summary

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 Website Safety

Overview

Last Updated: 12/25/2024

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 Rank History

Alexa Rank shows how popular cut-the-knot.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If cut-the-knot.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to cut-the-knot.org and pageviews on cut-the-knot.org over the past 3 months.

Cut-the-knot.org Hosting 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

#
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# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
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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

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# If you see inaccuracies in the results, please report at
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Cut-the-knot.org Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

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
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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.
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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.
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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 Check

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 Performance

Last tested: 11/20/2016

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 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

Cut-the-knot.org Overview

Cut-the-knot.org Rank Summary

Cut-the-knot.org Website Safety

Cut-the-knot.org Rank History

Cut-the-knot.org Hosting Information

Cut-the-knot.org Domain Registration and Settings

Cut-the-knot.org HTML Check

Cut-the-knot.org Desktop Performance

Cut-the-knot.org Mobile Insights

Cut-the-knot.org Similar Audits

Cut-the-knot.org Common Typos