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# Math Puzzles Forum

Math Puzzle Forum: For math puzzles, brain teasers, word problems

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2. ### 24 Game Marathon

• Replies: 75
• Views: 6,126
Sep 20th 2013, 08:47 PM
3. ### Is it true that...

• Replies: 27
• Views: 1,941
Jun 29th 2010, 08:25 AM
4. ### A possible new paradox puzzle?

• Replies: 27
• Views: 1,563
Sep 11th 2010, 09:46 AM
5. ### which two numbers do not belong in here?

• Replies: 25
• Views: 2,252
Apr 30th 2011, 06:30 AM
6. ### trig identity for sqrt(2)/2

• Replies: 20
• Views: 1,887
Jan 9th 2010, 04:31 PM
7. ### Complete the series

• Replies: 20
• Views: 2,092
Apr 17th 2010, 12:19 AM
8. ### It can be paint or not

• Replies: 18
• Views: 1,572
Sep 28th 2012, 01:46 AM
9. ### A leading question: what do these numbers have in common?

• Replies: 16
• Views: 1,913
Jul 7th 2010, 07:41 AM
10. ### Initials Quiz - Part 2

• Replies: 15
• Views: 2,697
Jul 6th 2010, 12:59 AM

• Replies: 15
• Views: 1,406
Oct 29th 2010, 07:36 AM
12. ### Fun little problem

• Replies: 15
• Views: 1,523
Jan 10th 2011, 07:02 PM
13. ### The role of prior knowledge in probability.

• Replies: 15
• Views: 2,315
Apr 24th 2013, 02:46 PM
14. ### Series

• Replies: 15
• Views: 1,145
May 14th 2014, 10:27 AM
15. ### A puzzle and a call for help.

• Replies: 14
• Views: 1,039
Aug 23rd 2009, 07:39 PM
16. ### Odd proof - Can you spot the error?

• Replies: 14
• Views: 1,369
Mar 8th 2010, 03:57 PM
17. ### Anagrams

• Replies: 14
• Views: 1,195
Mar 15th 2010, 11:06 PM
18. ### Puzzle needs to be solved

• Replies: 14
• Views: 969
Aug 12th 2010, 08:28 AM
19. ### Cute stuff

• Replies: 14
• Views: 1,068
Nov 22nd 2010, 03:38 PM
20. ### 1,3,7,25,103,?

• Replies: 14
• Views: 1,885
Aug 31st 2016, 09:48 AM
21. ### Animals in Hiding

• Replies: 13
• Views: 1,239
Jun 5th 2009, 04:57 AM
22. ### Number pattern.

• Replies: 13
• Views: 2,946
May 8th 2010, 06:29 PM
23. ### Letter / Number puzzle

• Replies: 13
• Views: 1,381
Jun 10th 2010, 10:32 AM

• Replies: 13
• Views: 876
Aug 5th 2010, 03:27 AM
25. ### Grouping efficiency - baskets, ingredients, and pies

• Replies: 13
• Views: 735
Oct 7th 2011, 03:29 AM
26. ### the two envelopes problem. My take. I want to know opinions)

• Replies: 13
• Views: 908
May 1st 2014, 07:34 AM
27. ### One Puzzle

• Replies: 13
• Views: 878
May 21st 2014, 03:59 AM

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