3, 12, 6, 24, 12, ___
48 (x4, divide by 2, x4, divide by 2, x4)
7, 14, 9, 18, 11, ___
22 (1st, 3rd and 5th numbers +2, 2nd, 4th and 6th numbers +4)
10, 12, 15, 19, ___
24 (+2, +3, +4, +5)
2, 10, 5, 20, 8, ___
30 (1st, 3rd and 5th numbers +3, 2nd, 4th and 6th numbers +10)
2, 6, 18, ___, 162
54 (x3 each time)
4, 16, 9, 18, 14, ___
20 (1st, 3rd and 5th numbers +5, 2nd, 4th and 6th numbers +2)
3, 4, 6, 9, 13, ___
18 (+1, +2, +3, +4 ,+5)
50, 45, 39, 32, ___
24 (-5, -6, -7, -8)
4, 7, 10, ___, 16
13 (+3 each time)
5, 8, 4, 7, 3, ___
6 (+3 -4, +3, -4, +3)
30, 20, 10, ___, −10
0 (-10 each time)