The only perfect square between 100 and 1000?

There is more than one perfect square between 100 and 1000!

All the perfect squares between those two numbers:

121, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484, 529, 576, 625, 676, 729, 784, 841, 900 and 961.