What number comes next?
17
18
15
14
10, 20, ___
30
5, 10, ___
15
17 or 15?
17
26
27
23
22
20, 30, _____
40
10, 15, ____
20
25 or 24?
25
32
33
35
34
30, 40, _____
50
15, 20, ____
25
37 or 39?
39
48
49
47
46
40, 50, _____
60
20, 25, ___
30
44 or 42?
44
51
52
55
54
50, 60, ____
70
25, 30, ____
35
59 or 58?
59