It is a series. 17, that minus 2 = 15, that minus 7 = 8, that plus 7 =15, and then that -3 =12, that -6 =6, that +6 =12 so I expect the next terms would be that result -4 (to give 8) and then that -5 (to give 3), then that +5 (to give 8) and so on.
The factors of 12 are: 1, 2, 3, 4, 6, 12 The factors of 60 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 The factors of 68 are: 1, 2, 4, 17, 34, 68
11: 1, 11 12: 1, 2, 3, 4, 6, 12 13: 1, 13 14: 1, 2, 7, 14 15: 1, 3, 5, 15 16: 1, 2, 4, 8, 16 17: 1, 17 18: 1, 2, 3, 6, 9, 18 19: 1, 19 20: 1, 2, 4, 5, 10, 20
The greatest common factor of 8, 12, and 30 is 2
The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24. The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30.
The factors of 6 are: 1, 2, 3, 6 The factors of 15 are: 1, 3, 5, 15 The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, 24 The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36
17 7/8 - 12 3/12 17 21/24 - 12 6/24=5 15/24 Answer is 5 and 15 over 24.
9.75
6 8 9 10 12 14 15 16
There are probably tens of such sets. Some are: 5, 6, 7, 7, 8, 11, 13, 14, 15, 16, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 15, 16, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 14, 16, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 14, 15, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 15, 15, 17, 18 5, 6, 7, 7, 7, 12, 12, 14, 15, 16, 16, 18 5, 6, 7, 7, 7, 12, 12, 14, 14, 16, 16, 18
4, 6, 8, 9, 10, 12, 14, 15, 16,
4, 6, 8, 9, 10, 12, 14, and 15
17 :)
252.
10 11 9 12 13 8 14 7 15 6 16 5 17
1+16 2+15 3+14 4+13 5+12 6+11 7+10 8+9
15
1+16=17 --------------------------------------- 2+15=173+ 14=17 --------------------------------------- 4+13=175+12=17 --------------------------------------- 6+11=177+10=17 --------------------------------------- 8+9=17