7, 14, 9, 18, 11, ___
22 (1st, 3rd and 5th numbers +2, 2nd, 4th and 6th numbers +4) ODDS AND EVENS
10, 12, 15, 19, ___
24 (+2, +3, +4, +5) PROGRESSIVE
4, 7, 10, ___, 16
13 (+3 each time) SIMPLE
8 : 16, 5 : 10, 12 : ___
24 (left x 2 = right) MULTI-STEP
4, 16, 9, 18, 14, ___
20 (1st, 3rd and 5th numbers +5, 2nd, 4th and 6th numbers +2) ODDS AND EVENS
9 : 4, 13 : 8, 20 : ___
15 (left - 5 = right)
30 : 15, 18 : 9, 42 : ___
21 (left divided by 2 = right)
4 : 18, 3 : 14, 7 : ___
30 (left x 4 + 2 = right) MULTI-STEP
5, 8, 4, 7, 3, ___
6 (+3 -4, +3, -4, +3) ALTERNATING
6 : 14, 10 : 22, 3 : ___
8 (left x 2 + 2 = right) MULTI-STEP
50, 45, 39, 32, ___
24 (-5, -6, -7, -8) PROGRESSIVE
3 : 9, 5 : 25, 7 : ___
49 (left squared = right)
2 : 8, 3 : 18, 5 : ___
50 (left squared x 2 = right) MULTI-STEP
2, 6, 18, ___, 162
54 (x3 each time) SIMPLE
12 : 5, 20 : 13, 30 : ___
23 (left - 7 = right)
30, 20, 10, ___, −10
0 (-10 each time) SIMPLE
3, 12, 6, 24, 12, ___
48 (x4, divide by 2, x4, divide by 2, x4) ALTERNATING
4 : 16, 6 : 36, 9 : ___
81 (left squared = right)
3, 4, 6, 9, 13, ___
18 (+1, +2, +3, +4 ,+5) PROGRESSIVE
2, 10, 5, 20, 8, ___
30 (1st, 3rd and 5th numbers +3, 2nd, 4th and 6th numbers +10) ODDS AND EVENS