The square root of 100 is 10. 100 is a perfect square, with both 100 and its square root 10 having the unit digit as 0. This is the smallest three digit perfect square with the smallest two digit number as its square root (10).

The square root of 100 is 10. 100 is a perfect square, with both 100 and its square root 10 having the unit digit as 0. This is the smallest three digit perfect square with the smallest two digit number as its square root (10).

The nearest previous perfect square is 81 and the nearest next perfect square is 121 .