To solve this question we have to make deduct these 2 years. 2018 minus 2013 will give the answer.
You are 5 years old.
(60 months are passed.)
From 2013 to 2018 there are 5 years. If you want to learn your age in 2018 (born in 2013) your age is 5.
Let's see what will be your age if you born +1 or -1 from that date.