Question

what is the square root of 324?

Answer 1

Answer:

18 square root .......mark me as brainllist

Answer 2

Answer:

18

Step-by-step explanation

I used to make my students memorise all the squares, and the corresponding square roots, up to 20. So if you did this you would be able to write the answer straight down as being 18

#If the number is outside the students range then using prime factors is a a good way to go

324=22×34

this is left as an exercise for the student to verify

√324=√22×34

to square root numbers with powers simply half the powers of each number

√324=√22×√34=21*32=2×9=18

as before