User blog:Havemeforty/Birthday Maths Problem

In 9th December 2012, it is my birthday and I will be 13

But a maths problem popped by inside my head

A Guest (a Yellow Triclopian from Bullethead) told me a Maths problem.

In the last 5 years before my birthday, I was 7

When will I be in the next 5 years before my birthday?

Clues :

It is not 18

The "my birthday" in the question is nothing to do with the triclopian, it's something to do with me

Puzzle 003 : Birthday

Picarats : 10

Previous Puzzles :

Puzzle 001 : Bunk Beds (Winner : NOBODY)

Puzzle 002 : Burglary (Winner : NOBODY)