To solve this question we have to make deduct these 2 years. 2105 minus 1985 will give the answer.
You are 120 years old.
(1440 months are passed.)
From 1985 to 2105 there are 120 years. If you want to learn your age in 2105 (born in 1985) your age is 120.
Let's see what will be your age if you born +1 or -1 from that date.