15.
15*15 = 225
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They are 15 and -15
The square root of 100 = 10 The square root of 225 = 15 The sum = 10 + 15 = 25
Well, isn't that just lovely! The square root of 121 is 11, the square root of 169 is 13, and the square root of 225 is 15. Just like painting a happy little tree, finding square roots can bring a sense of peace and harmony to your mathematical journey. Keep exploring and embracing those numbers with joy!
it is 225
Out of these numbers, 225 is a square number since the square root of 225 is 15.