ITMC 2026 Grade 3 National Preliminary sample-r1 Question 21

A square number is a positive integer multiplied by itself. For example 1 × 1 = 1, 2 × 2 = 4, 3 × 3 = 9, 4 × 4 = 16, 5 × 5 = 25, …, so 1, 4, 9, 16, 25, … are square numbers. What is the greatest three-digit square number less than 300?