9. 6
11. 56
13. 362,880
15. 1
17. 56
19. 126
21. 1
23. 1
676
650
27. 2450
29. 24
31. 60
33. 10
35. 55
37. 330
39. 20,160
41. 120
160
800
12,144
13,824
47. 256
49. Yes
5040
5040
10
10
5
55. 105
57. 3,628,800
59. The maximum number of times each child will go to the circus is 20. The father will go 35 times.
61. 111,007,923,832,370,565
63. 80
65. 15
67. 360
69. 420