The square root sign looks like a big check mark with a line on it.
The square root of a number is what number when multiplied by itself will give you the original number. For example, if you need to find the square root of 81 or
you need to ask yourself “what times itself is 81?” Of course the answer is 9.
√81 = 9
Sometimes the number will be too large to know off hand and you will have to guess. For example
Just start guessing, going up or down, until you get to the right number.
15 x 15 = 225
No, too low.
20 x 20 = 400
No, too high, but close.
19 x 19 =361
If you are on the part of the test where you have access to a calculator, just use the square root key. So just punch in the number whose square root you’re trying to find, like 361, hit