Question 892717
<pre>
The multiples of 13 that could be his age after 2 years. 

13, 26, 39, 52, 65, 78, 91

If his age after 2 years was any of those, then after 1 year his age would be

12, 25, 38, 51, 64, 78, 90

The only one of those that's a multiple of 5 is 25.

Further checking 26, 2 less than 26 is 24, a multiple of 3.

So the answer is 24.

Edwin</pre>