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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: 881
Apr 15th 2014, 05:32 PM
1. ### "The world's slowest runner"

• Replies: 10
• Views: 2,278
Dec 27th 2007, 01:26 AM
2. ### Hand shake????

• Replies: 5
• Views: 1,026
Feb 11th 2015, 06:42 PM
3. ### Brain twister????

• Replies: 1
• Views: 976
Oct 20th 2014, 08:40 AM

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

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• Views: 862
Mar 12th 2012, 11:07 PM
6. ### Fun Little Differential Equation Exercise

• Replies: 7
• Views: 1,148
Dec 2nd 2011, 08:35 PM
7. ### An interesting problem for Multivariable Calculus Students

• Replies: 4
• Views: 1,148
Apr 25th 2012, 05:52 AM
8. ### [SOLVED] help: strange characters

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• Views: 1,601
May 4th 2005, 01:53 PM
9. ### A Novel Bound for Polynomials?

• Replies: 4
• Views: 791
Jul 10th 2009, 03:27 PM
10. ### Large Number

• Replies: 2
• Views: 734
Jul 10th 2009, 09:02 PM
11. ### inequality

• Replies: 7
• Views: 1,219
Jul 25th 2010, 07:11 PM

• Replies: 8
• Views: 737
Jun 7th 2010, 04:28 AM
13. ### absolute value

• Replies: 2
• Views: 777
Jun 10th 2010, 06:35 AM
14. ### proof of De Morgan laws

• Replies: 5
• Views: 14,662
Jun 20th 2010, 06:02 AM
15. ### algebraic problem

• Replies: 2
• Views: 745
Jun 24th 2010, 08:06 AM
16. ### Theorem in limits

• Replies: 0
• Views: 636
Jun 28th 2010, 05:14 PM
17. ### function proof

• Replies: 8
• Views: 861
Jul 4th 2010, 03:47 PM
18. ### Maths Square

• Replies: 2
• Views: 1,020
Aug 22nd 2006, 10:10 AM
19. ### Inequality proof.

• Replies: 2
• Views: 782
Jun 28th 2011, 09:59 PM
20. ### Sudoku as a mathematics teaching aid

• Replies: 2
• Views: 1,994
Dec 2nd 2008, 09:13 PM
21. ### Where's the Extra Dollar

• Replies: 7
• Views: 2,952
Dec 21st 2005, 09:45 AM

• Replies: 1
• Views: 554
Nov 26th 2008, 12:11 PM
23. ### good math books

• Replies: 1
• Views: 965
May 10th 2008, 12:17 AM
24. ### Factors and Multiples - 3 bells tolling

• Replies: 2
• Views: 661
Jun 12th 2013, 09:43 AM
25. ### French Powers

• Replies: 2
• Views: 1,181
Feb 12th 2007, 08:57 AM

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27. ### Puzzle ring

• Replies: 2
• Views: 1,956
Oct 28th 2007, 10:21 PM
28. ### The Missing dollar.

• Replies: 2
• Views: 1,400
Jul 18th 2008, 08:06 AM

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