√25 = 5. The square root of 25 is 5, because 5 × 5 = 25. 25 is a perfect square.
√25 at a glance.
Value
5
Rounded
5
Perfect square?
Yes
25 squared
625
Checking it in your head
A perfect square's root is a whole number, so check by multiplying back: 5 × 5 = 25. Its last digit fits too: squares only ever end in 0, 1, 4, 5, 6 or 9, and 5² ends in 5.
Frequently asked questions
What is the square root of 25?
The square root of 25 is 5, because 5 × 5 = 25. 25 is a perfect square.