To solve this question we have to make deduct these 2 years. 2105 minus 1980 will give the answer.
You are 125 years old.
(1500 months are passed.)
From 1980 to 2105 there are 125 years. If you want to learn your age in 2105 (born in 1980) your age is 125.
Let's see what will be your age if you born +1 or -1 from that date.