Question 21
A special square has an area that is a multiple of its perimeter. For example, a square of side length 8 is special because its perimeter 32 is a factor of its area 64. How many special squares have a whole-number side length less than 2021?
Count distinct positive side lengths. Compare numerical measurements in the same fixed unit; zero-length squares are excluded.
Input: enter a whole number without units; leading zeroes from the paper answer grid may be omitted.
Count distinct positive side lengths. Compare numerical measurements in the same fixed unit; zero-length squares are excluded.
Input: enter a whole number without units; leading zeroes from the paper answer grid may be omitted.