Question

Which of these numbers is a square number? 128 225 360 or 399

Answer 1

225, 15^2 (squared) = 225

15 x 15= 225

Answer 2

225.

Explanation:

We have been given some numbers. We are asked to find the number, which is a square.

Let us take square root of each number one by one.

`√(128)=11.3137084`; Not a square.

`√(225)=√(15^2)=15`; A square.

`√(360)=18.9736659`; Not a square.

`√(399)=19.974984`; Not a square.

Therefore, 225 is a square.