The square root of 387 must be a number between what two numbers?

1 Answer
EZ as pi
Sep 16, 2016

19 < sqrt387 <20

Explanation:

It helps to know the squares of the first 20 natural numbers by heart.

20^2 = 400 which is not very far from 357.

19^2 = 361

387 " is between " 361 and 400

361 < 387 <400

19 < sqrt387 <20

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