To solve this question we have to make deduct these 2 years. 2100 minus 1965 will give the answer.
You are 135 years old.
(1620 months are passed.)
From 1965 to 2100 there are 135 years. If you want to learn your age in 2100 (born in 1965) your age is 135.
Let's see what will be your age if you born +1 or -1 from that date.