Straight to Jail
We know you guys are tired of math mishaps, but this one might make you giggle. According to the OP, if a child was born in 2010, and it’s currently 2018, then they would be 18 years old. Let that sink in. No, seriously, let that sink in. It’s been waiting outside for hours now (lame).
Anyway, we have no idea why the OP added ten to the actual result. If our math is correct, 2018 – 2010 = 8, but if you consult R. Kelly on that, then of course, you’re going to get 18. Enjoy your time in prison, Roger.