To solve this question we have to make deduct these 2 years. 2105 minus 1965 will give the answer.
You are 140 years old.
(1680 months are passed.)
From 1965 to 2105 there are 140 years. If you want to learn your age in 2105 (born in 1965) your age is 140.
Let's see what will be your age if you born +1 or -1 from that date.