Question

Between which two integers does the square root of `90` lie?

Answer 1

The square root of `90` lies between `9` and `10`

Explanation:

Note that:

`overbrace(9*9)^81 < overbrace(9*10)^90 < overbrace(10*10)^100`

Hence:

`9 = sqrt(81) < sqrt(90) < sqrt(100) = 10`