Question

Between what two consecutive integers is `sqrt151`?

Answer 1

`sqrt144 < sqrt 151 < sqrt169`

`12< sqrt151 <13`

Explanation:

It really is an advantage to know the square numbers up to 400 by heart.
`1^2 = 1," " 2^2=4," " 3^2=9," " ......" " 20^2=400`

Then you have.......`12^2 = 144" "and 13^2=169`

151 lies between 144 and 169, so

`sqrt151 " lies between " 12 and 13.`