Question

how many integers N have rational square roots of
a. 1 14 years ago

Answer 1

Take the square root of the upper bounds, and take the integer part of them (that is, drop the decimals). That's the answer to each of them.

Answer 2

a) 1 ≤ N ≤ 100 => 10

b) 1 ≤ N ≤ 1000 => 31

c) 1 ≤ N ≤ 10000 => 100.