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

1 Answer
Sep 16, 2016

Answer:

#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#