Question

Which of the following is a rational number?
square root 15 square root 16, square root 21, square root 22

Answer 1

@some.random.cool.kid

Answer 2

hold on almost done.

Answer 3

is any one of the numbers 15, 16 21 or 22 a perfect square?

Answer 4

Yes

Answer 5

ok so rational means that it can be divided by 1 if it can be then its rational so thats how you can solve this

Answer 6

also it would have to be a whole number

Answer 7

So would 15 be the answer?

Answer 8

no

Answer 9

yeah no it would be ... something with uh how to put this

Answer 10

start from 1 multiply each number by 4...

Answer 11

1* 4 = 4 . 2 * 4 = ?

Answer 12

I don't know how to do all that. But I do think the answer is 15.

Answer 13

@cwrw238 great idea

Answer 14

well no its not 15

Answer 15

8

Answer 16

your close though :} its higher

Answer 17

16

Answer 18

thats 4*2 - carry on 4*3 = ?

Answer 19

right 16 is a perfect square , 4 times 4 = 16

Answer 20

yay

Answer 21

correct

Answer 22

:} great job

Answer 23

square root of 16 is 4 , 4 is rational

Answer 24

THANKS!

Answer 25

yw

Answer 26

Can you guys help me with a few more questions

Answer 27

there you go! @timeflybyegirl @cwrw238 was trying to get you to calculate that so you can get the answer!

Answer 28

no prob bye bye its been fun wroking with you timefly but i kind of i have to finish my own math module exam so bye.

Answer 29

Bye thanks for helping :)