Fill in the missing number on the question
mark.
| 1. 8, 11, 5, 10, 13, 7, 14, ?, 11,... | ? = 17 (+3, -6, x2, +3, -6, x2,...) |
| 2. 1, 2, 2, 4, 8 ,11 ,? ,37 ,... | ? = 33 (+1, x1, +2, x2, +3, x3,...) |
| 3. 2, 5, 10, 17, 28, ?, 58,... | ? = 41 (+ next prime number,...) |
| 4. 1, 3, 4, 7, 19, ?, 180,... | ? = 47 (1x3+4=7; 3x4+7 = 19,...) |
| 5. 1, 4, 9, 7, 7, 9, ?, 10,... | ? = 13 (sum of digits of squares) |
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