Question

Between what two consecutive integers would the square root of 40 fall?

A. 5 and 6

B 6 and 7

C 7 and 8

D 36 and 49

Answer 1

`√(40)=√(2\cdot2^2\cdot5)=2√(10)`

Notice that
`√(10)\approx3.2` which means
`√(40)\approx2\cdot3.2\approx6.4`.

So answer is B.

Hope this helps :)