To solve this question we have to make deduct these 2 years. 2105 minus 1970 will give the answer.
You are 135 years old.
(1620 months are passed.)
From 1970 to 2105 there are 135 years. If you want to learn your age in 2105 (born in 1970) your age is 135.
Let's see what will be your age if you born +1 or -1 from that date.