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# Forum: Challenge Questions and Puzzles

Have a challenging question or puzzle you want to share with the community? Post it here (homework questions do NOT belong here).

2. ### value of k in definite Integration

• Replies: 0
• Views: 368
February 14th, 2020, 10:33
3. ### Definite Integral Challenge

• Replies: 6
• Views: 1,461
February 1st, 2020, 19:16
4. ### Number theory problem #1

• Replies: 1
• Views: 636
January 4th, 2020, 17:38
5. ### Can we apply here logic?

• Replies: 1
• Views: 641
December 26th, 2019, 07:56
6. ### Exponential series limit

• Replies: 3
• Views: 744
November 25th, 2019, 12:40
7. ### limit

• Replies: 7
• Views: 1,040
November 25th, 2019, 10:28
8. ### Limit with Integration

• Replies: 1
• Views: 957
November 13th, 2019, 03:44
9. ### inequality

• Replies: 7
• Views: 1,264
November 9th, 2019, 18:03
10. ### axiomatics

• Replies: 0
• Views: 764
November 1st, 2019, 22:41
11. ### Geometrical problem

• Replies: 1
• Views: 931
October 22nd, 2019, 10:06
12. ### logic problem

• Replies: 3
• Views: 901
October 19th, 2019, 07:59
13. ### high school inequality

• Replies: 4
• Views: 1,225
September 28th, 2019, 21:44
14. ### high school inequality 2

• Replies: 1
• Views: 517
September 28th, 2019, 15:41

• Replies: 4
• Views: 833
September 17th, 2019, 09:47
16. ### Multiple consists of only 6's and 7's

• Replies: 11
• Views: 1,423
September 16th, 2019, 05:45
17. ### Multiple consists of only 1's

• Replies: 4
• Views: 650
September 12th, 2019, 10:23
18. ### Trigonometric Sum Challenge

• Replies: 3
• Views: 814
September 8th, 2019, 05:46
19. ### Volume of a solid

• Replies: 2
• Views: 525
September 4th, 2019, 16:17
20. ### Maximize the sum of squared distances

• Replies: 1
• Views: 374
August 20th, 2019, 13:54
21. ### Probability challenge

• Replies: 4
• Views: 662
August 15th, 2019, 16:54
22. ### Find the possible values of k

• Replies: 2
• Views: 548
August 3rd, 2019, 14:55
23. ### Determine all possible values

• Replies: 2
• Views: 553
July 29th, 2019, 16:31
24. ### Limit of integral challenge

• Replies: 2
• Views: 506
July 25th, 2019, 16:24
25. ### Electrical Engineering Problem

• Replies: 1
• Views: 362
July 2nd, 2019, 21:36
26. ### Constractive dilemma

• Replies: 1
• Views: 530
June 28th, 2019, 11:13
27. ### Unsolved Challenge Challenge Problem #7 [Olinguito]

• Replies: 2
• Views: 717
June 22nd, 2019, 16:51
28. ### [SOLVED] Challenge Problem #9 [Olinguito]

• Replies: 4
• Views: 832
June 16th, 2019, 13:39
29. ### Challenge Problem #8 [Olinguito]

• Replies: 3
• Views: 691
June 14th, 2019, 08:11
30. ### Challenge. Difficulty level - medium

• Replies: 0
• Views: 372
June 13th, 2019, 12:37

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