Question

Which number is prime?

A.
63

B.
57

C.
59

D.
51

Answer 1

Prime numbers can only be divisible by 1 and itself.

Answer 2

d

Answer 3

No, 51 is divisible by 3.

Answer 4

A number is divisible by 3 if the sum of its digits are divisible by 3

Answer 5

Oh yeah.. :P

51 = 5 + 1 = 6

6 / 3 = 2

Answer 6

So which one do you think is correct? @S117

Answer 7

i think a,

Answer 8

No..that is also divisible by 3.

6 + 3 = 9

9 / 3 = 3

Answer 9

59

Answer 10

Look at B.

57 = 5 + 7

What's 5 + 7?

Answer 11

12

Answer 12

Yes, and is 12 divisible by 3?

Answer 13

yeal

Answer 14

yea

Answer 15

Yes, so it is not prime.

Answer 16

Let's look at 59

What's 5 + 9?

Answer 17

Its 59

Answer 18

@shaunte1234 Please do not give answers, it's against OpenStudy's Code-of-Conduct. We are here to guide the asker to the answer, so we need his/her participation.

http://openstudy.com/code-of-conduct

Answer 19

14

Answer 20

@iGreen.

Answer 21

Yes, and is 14 divisible by 3?

Answer 22

no

Answer 23

Yes, so 69 is your answer.

Answer 24

Just joined 15 min. ago sorry I didn't relise there was a code of conduct I'll be sure to follow it but, yeah it is 59

Answer 25

Yes, you were supposed to read it before you joined. You checked the box and agreed to it.

Answer 26

its 57 because its like even and odd numbers