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Showing below up to 50 results in range #1 to #50.

1. Palindromic odometer (18:23, 23 April 2010)
2. Houses and utilities (12:55, 13 May 2010)
3. Egg timers (11:06, 20 May 2010)
4. Eight queens (21:00, 26 May 2010)
5. Nine prisoners (13:23, 28 May 2010)
6. Six towns (21:21, 31 May 2010)
7. Lying to the young (12:59, 5 June 2010)
8. Earings (19:07, 7 June 2010)
9. Ten digit number (10:08, 8 June 2010)
10. Divisible by nine digits (20:08, 13 July 2010)
11. Jogging a hill (13:00, 19 August 2010)
12. Three prisoners (08:03, 20 August 2010)
13. Three guesses (12:22, 26 August 2010)
14. Seven orbs (13:32, 11 October 2010)
15. Friends at a party (06:46, 13 October 2010)
16. True or false (18:57, 13 October 2010)
17. Light bulb (19:49, 14 October 2010)
18. Three couples (07:06, 21 October 2010)
19. Fill in the blanks (08:03, 21 October 2010)
20. Probably blackjack (02:09, 22 October 2010)
21. Turn off a calculator (19:39, 6 November 2010)
22. Friends or non-friends (18:44, 7 November 2010)
23. Fifteen (13:10, 18 November 2010)
24. Prom problem (18:13, 23 November 2010)
25. Three logicians (18:14, 23 November 2010)
26. Wrong address (18:14, 23 November 2010)
27. Angels and demons (18:14, 23 November 2010)
28. Bags of gems (18:15, 23 November 2010)
29. Five towns (18:16, 23 November 2010)
30. Splitting ten (18:19, 23 November 2010)
31. Double Russian roulette (18:19, 23 November 2010)
32. Frog staircase (18:19, 23 November 2010)
33. Failed exams (06:45, 24 November 2010)
34. Forty thieves (06:46, 24 November 2010)
35. Times of day (06:50, 24 November 2010)
36. Twelve weights (06:50, 24 November 2010)
37. Two guards (06:50, 24 November 2010)
38. Three digit magic (06:50, 24 November 2010)
39. Blank dice (06:51, 24 November 2010)
40. Two EGGs (06:51, 24 November 2010)
41. Nine minute fuse (06:51, 24 November 2010)
42. Red vs black (06:51, 24 November 2010)
43. Poison (06:51, 24 November 2010)
44. Farmer and the boat (06:51, 24 November 2010)
45. Eight weights (06:51, 24 November 2010)
46. Green eyed dragons (06:52, 24 November 2010)
47. Five pirates (06:52, 24 November 2010)
48. Commuter (06:52, 24 November 2010)
49. Next number (06:52, 24 November 2010)
50. Three princesses (06:52, 24 November 2010)