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Math Challenge Problems Forum

Math Challenge Problem Forum: For challenging math problems (that you can solve yourself)

1. Read this first!

• Replies: 0
• Views: 1,271
Apr 15th 2014, 04:32 PM
1. How to show int (sinx /x) dx (x-0..infinity) is convergent

• Replies: 9
• Views: 18,880
Sep 29th 2012, 05:50 PM
2. proof of De Morgan laws

• Replies: 5
• Views: 16,024
Jun 20th 2010, 05:02 AM
3. Trick Questions

• Replies: 85
• Views: 12,022
Nov 19th 2006, 04:18 AM
4. Problem 50

• Replies: 18
• Views: 10,938
Aug 7th 2009, 03:45 PM
5. MHF Integral Bee!

• Replies: 103
• Views: 8,926
Aug 24th 2009, 04:28 AM
6. 2011 MIT Integration Bee Qualifying Test

• Replies: 38
• Views: 8,521
Feb 1st 2011, 01:59 AM
7. Prove some identities!

• Replies: 105
• Views: 7,931
Dec 29th 2010, 10:58 PM
8. Prove some identities! (Round two)

• Replies: 93
• Views: 7,863
Feb 7th 2011, 03:50 AM
9. 5 pirates sharing the booty

• Replies: 25
• Views: 7,008
Sep 12th 2007, 08:00 PM
10. Permutations

• Replies: 10
• Views: 6,421
Jan 1st 2013, 11:39 AM
11. Jacobi identity

• Replies: 11
• Views: 6,293
Oct 8th 2009, 12:20 AM
12. Problem 48

• Replies: 15
• Views: 5,757
Oct 12th 2008, 12:51 PM
13. Problem 40

• Replies: 30
• Views: 5,122
Nov 18th 2007, 05:45 PM
14. card 'trick' and group theory

• Replies: 17
• Views: 5,036
Dec 23rd 2006, 08:21 AM
15. Walk 1 mi South, 1 mi West, 1 mi North, end up where you started

• Replies: 6
• Views: 4,764
Jan 11th 2009, 10:33 AM
16. The Locker Problem

• Replies: 3
• Views: 4,736
Feb 15th 2007, 07:06 PM
17. Need help on POW 12: The Big Knight Switch

• Replies: 2
• Views: 4,575
Jun 5th 2005, 04:35 PM
18. 4x4 Grid Puzzle

• Replies: 7
• Views: 4,358
Jun 17th 2008, 12:46 PM
19. Proof that 1 = 2

• Replies: 29
• Views: 4,165
Jul 20th 2013, 02:59 PM
20. Power series for tangent function

• Replies: 1
• Views: 4,085
Oct 24th 2009, 05:41 AM
21. How many rectangles in a 10 x 10 checkerboard?

• Replies: 3
• Views: 3,960
Nov 11th 2005, 11:57 PM
22. Four Eights Problem

• Replies: 8
• Views: 3,642
Jan 19th 2007, 04:47 AM
23. Solution behind a card trick?

• Replies: 4
• Views: 3,513
Apr 16th 2008, 08:53 PM
24. Problem 44

• Replies: 17
• Views: 3,435
Feb 10th 2008, 07:04 PM

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