How many leap years since 1953?

Answer 1

Well, isn't that a happy little question! Let's see, to find the number of leap years since 1953, we need to count the years that are divisible by 4, except for years that are divisible by 100 unless they are also divisible by 400. So, from 1953 to 2021, there have been 17 leap years.

Answer 2

All years divisible by 4 are leap years: 1956, 1960, etc. (add 4 at a time).

Answer 3

20