Question

Which is a rational number /?
/9
/15
/28
/52

Answer 1

√9 = 3
√15 = irrational
√28 = 2√7= irrational
√52= 2√13= irrational

Answer 2

Thanks .

Answer 3

You can put up a square root symbol doing....

1) Press ALT and HOLD IT.
2) Click 2 5 1 (on the numbers on the right of the keyboard, NOT the ones below F1, F2, F3...)
3) Release the ALT.

Answer 4

Does this work, @Lyric432156 ?

Answer 5

The square root will be rational if the number inside it is a perfect square.

Answer 6

That means it's a number times itself.