MCQ - 15-1393

Correct Answer: A

Explanation:

The smallest perfect square between 100 and 1,000 inclusive is 100 itself, since 10²=100. The largest can be found by noting that ${\displaystyle \sqrt{1,000}\approx <!--\; \approx \; -->31.6}$; this makes 31² = 961 the greatest perfect square in this range.

Since the squares of the integers from 10 to 31 all fall in this range, this makes 31 − 10 + 1 = 22 perfect squares.