Question

Which of the numbers given below is NOT a square number?
(A) 1225
(B) 2025
(C) 2525
(D) 4225

Answer 1

To find out if a number is a square number, we square root the number. If the answer is an integer, the number is a square number.

a) 1225.  √1225 = 35 ⇒this is a square number

b) 2025.  √2025 = 45 ⇒ this is a square number

c) 2525.  √2525 = 50.25 ⇒ this is not a square number

d)4225.  √4225 = 65 ⇒ this is a square number

Answer: (c) 2525

Answer 2

Answer is (c)
$2525$