#shellfishdimes

so, people born in 1980, were 0 years that year, right? By 1990, they were 10. So basically, from 1980 to 2009 you can very easily know their ages, from 2010 and on you maybe have to think a little bit more.

The thing is, you just have to take the first and last number, and that’s their age! And for the decade of the 80′s and the 10′s and on you only take the last number and use logic to know the decade

1987? 7

1995? 15

2003? 23

2042? 62

actually, know that I write it down, it also works in the 2000′s with only adding 20 to the last 2 numbers, but as I said, that’s only needed after 2010:

2003 = 03+20 = 23