# Math Challenge Problems Forum

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

• Replies: 0
• Views: 935
Apr 15th 2014, 05:32 PM
1. ### An integral with a parameter

• Replies: 4
• Views: 1,052
Dec 12th 2009, 03:41 PM
2. ### Series in Trigonometry

• Replies: 10
• Views: 871
Dec 10th 2009, 03:04 AM
3. ### The Impossible Problem

• Replies: 1
• Views: 780
Dec 4th 2009, 08:36 AM
4. ### A semiprime proof

• Replies: 6
• Views: 863
Nov 30th 2009, 03:51 AM
5. ### interesting combinatorial identity proof

• Replies: 1
• Views: 881
Nov 29th 2009, 05:34 PM
6. ### i identity

• Replies: 2
• Views: 679
Nov 28th 2009, 01:28 PM
7. ### Math Challenge Web-site

• Replies: 2
• Views: 750
Nov 26th 2009, 09:39 PM
8. ### Number Theory (1)

• Replies: 3
• Views: 897
Nov 22nd 2009, 06:31 PM
9. ### Triangle inside rectangle

• Replies: 2
• Views: 1,890
Nov 20th 2009, 06:41 PM

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11. ### Size!

• Replies: 4
• Views: 1,079
Nov 16th 2009, 04:40 PM
12. ### About Euler's constant (4)...

• Replies: 4
• Views: 1,077
Nov 16th 2009, 08:37 AM
13. ### Probabilistic Group Theory

• Replies: 1
• Views: 921
Nov 15th 2009, 11:59 PM
14. ### Hyperfactorial function

• Replies: 3
• Views: 1,017
Nov 15th 2009, 09:55 AM
15. ### Integer puzzle

• Replies: 2
• Views: 771
Nov 14th 2009, 01:47 PM
16. ### About Euler's constant (3)...

• Replies: 1
• Views: 729
Nov 11th 2009, 08:02 AM
17. ### Trigonometric Inequality

• Replies: 6
• Views: 1,149
Nov 10th 2009, 07:55 AM
18. ### Set theory problem

• Replies: 4
• Views: 880
Nov 9th 2009, 10:22 PM
19. ### About Euler's constant (2)...

• Replies: 3
• Views: 993
Nov 9th 2009, 04:30 AM
20. ### About Euler's constant (1)...

• Replies: 13
• Views: 1,285
Nov 5th 2009, 12:10 PM
21. ### Find the number of extremum

• Replies: 4
• Views: 909
Oct 30th 2009, 03:13 AM
22. ### Which lightbulbs are on?

• Replies: 10
• Views: 1,812
Oct 28th 2009, 02:15 AM
23. ### Prime-counting function

• Replies: 2
• Views: 781
Oct 25th 2009, 01:10 AM
24. ### Not eventually constant!

• Replies: 3
• Views: 794
Oct 24th 2009, 08:08 AM
25. ### Power series for tangent function

• Replies: 1
• Views: 4,044
Oct 24th 2009, 06:41 AM
26. ### Tough & Beautiful!

• Replies: 4
• Views: 1,306
Oct 21st 2009, 12:39 AM

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