How old am I?

[Dieter]

(02-12-2018 10:52 AM)Paul Dale Wrote:  This is the eighth time that my age has ended with its current digit

So there are seven earlier occurences where the last digit of you age was the same as now. This means your age is > 70 and ≤ 80.

(02-12-2018 10:52 AM)Paul Dale Wrote:  and hasn't been prime.

This applies to all even ages except 72 (since 2 is prime). So you may be 74, 76, 78 or 80 now.

(02-12-2018 10:52 AM)Paul Dale Wrote:  How old am I?

I still don't know. But maybe there is something I didn't understand correctly.

Dieter