To solve this question we have to make deduct these 2 years. 2105 minus 1955 will give the answer.
You are 150 years old.
(1800 months are passed.)
From 1955 to 2105 there are 150 years. If you want to learn your age in 2105 (born in 1955) your age is 150.
Let's see what will be your age if you born +1 or -1 from that date.