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# Math Challenge Problems Forum

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

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• Views: 1,378
Apr 15th 2014, 04:32 PM
1. ### "The world's slowest runner"

• Replies: 10
• Views: 2,476
Dec 27th 2007, 12:26 AM
2. ### Hand shake????

• Replies: 5
• Views: 1,133
Feb 11th 2015, 05:42 PM
3. ### Brain twister????

• Replies: 1
• Views: 1,154
Oct 20th 2014, 07:40 AM

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5. ### pairwise differences of 20 +ve int. all < 70. At least 4 are equal.

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• Views: 1,025
Mar 12th 2012, 10:07 PM
6. ### Fun Little Differential Equation Exercise

• Replies: 7
• Views: 1,336
Dec 2nd 2011, 07:35 PM
7. ### An interesting problem for Multivariable Calculus Students

• Replies: 4
• Views: 1,226
Apr 25th 2012, 04:52 AM
8. ### [SOLVED] help: strange characters

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• Views: 1,649
May 4th 2005, 12:53 PM
9. ### A Novel Bound for Polynomials?

• Replies: 4
• Views: 853
Jul 10th 2009, 02:27 PM
10. ### Large Number

• Replies: 2
• Views: 885
Jul 10th 2009, 08:02 PM
11. ### inequality

• Replies: 7
• Views: 1,401
Jul 25th 2010, 06:11 PM

• Replies: 8
• Views: 840
Jun 7th 2010, 03:28 AM
13. ### absolute value

• Replies: 2
• Views: 925
Jun 10th 2010, 05:35 AM
14. ### proof of De Morgan laws

• Replies: 5
• Views: 16,096
Jun 20th 2010, 05:02 AM
15. ### algebraic problem

• Replies: 2
• Views: 885
Jun 24th 2010, 07:06 AM
16. ### Theorem in limits

• Replies: 0
• Views: 675
Jun 28th 2010, 04:14 PM
17. ### function proof

• Replies: 8
• Views: 932
Jul 4th 2010, 02:47 PM
18. ### Maths Square

• Replies: 2
• Views: 1,059
Aug 22nd 2006, 09:10 AM
19. ### Inequality proof.

• Replies: 2
• Views: 841
Jun 28th 2011, 08:59 PM
20. ### Sudoku as a mathematics teaching aid

• Replies: 2
• Views: 2,054
Dec 2nd 2008, 08:13 PM
21. ### Where's the Extra Dollar

• Replies: 7
• Views: 3,019
Dec 21st 2005, 08:45 AM

• Replies: 1
• Views: 584
Nov 26th 2008, 11:11 AM
23. ### good math books

• Replies: 1
• Views: 1,005
May 9th 2008, 11:17 PM
24. ### Factors and Multiples - 3 bells tolling

• Replies: 2
• Views: 703
Jun 12th 2013, 08:43 AM
25. ### French Powers

• Replies: 2
• Views: 1,318
Feb 12th 2007, 07:57 AM

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27. ### Puzzle ring

• Replies: 2
• Views: 2,047
Oct 28th 2007, 09:21 PM
28. ### The Missing dollar.

• Replies: 2
• Views: 1,446
Jul 18th 2008, 07:06 AM

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