Problem #37: For Those Under 16

Tell me in which columns your age appears and I will guess your age by adding the first number of the corresponding columns. Is this magic? squares, one square at a time.

+----+----+----+----+
|  2 |  8 |  4 |  1 |
|  3 |  9 |  5 |  3 |
|  6 | 10 |  6 |  5 |
|  7 | 11 |  7 |  7 |
| 10 | 12 | 12 |  9 |
| 11 | 13 | 13 | 11 |
| 14 | 14 | 14 | 13 |
| 15 | 15 | 15 | 15 |
+----+----+----+----+

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