Question

What pair of numbers are relatively prime?

A.11 and 121
B. 35 and 125
C. 39 and 75
D. 39 and 49

Answer 1

@TheSmartOne

Answer 2

@zepdrix

Answer 3

Understanding what relatively prime means will help you with this question! Check out this link and than tell me what you think it is!
https://www.mathsisfun.com/definitions/relatively-prime.html
(really short)

Answer 4

so they have to be evenly divided by 2 to be a realitively prime number

Answer 5

Nope that would make them not relatively prime

Answer 6

You may have read this part wrong
6 and 20 are not relatively prime because you can evenly divide both by 2 (2 is a common factor).
it says not

Answer 7

Basically you can't divide by anything without getting an uneven number unless it's 1 or the number itself

Answer 8

Now what do you think the answer is?

Answer 9

B

Answer 10

Nope you can divided 125 by 25 to get 5

Answer 11

and you can divided 35 to get 5 sevens

Answer 12

Lets think of it this way what can you divide 39 by?

Answer 13

@Samara89

Answer 14

D

Answer 15

Nope 7 times 7 is 49

Answer 16

C

Answer 17

Yes, but I think your a little confused because it seemed like guessing I would advise looking into what a prime number is a little more! ^_^ (it's very useful)

Answer 18

the answer was d

Answer 19

that doesn't make any sense

Answer 20

Wait I'm confused my self :o I'm so sorry

Answer 21

Perhaps you can ask your teacher? I'm sure they would be happy to help you

Answer 22

Relatively prime doesn't necessarily mean that the two numbers have to be prime. It just means that the two numbers must have no other common factors besides 1.

Answer 23

Yes, 39 and 49 have no common factors, so they are relatively prime.

Answer 24

Right, other than 1.

Answer 25

39 and 75 have 3 in common besides 1

Answer 26

Ahhh thank you for explaining that to them (and me as well) I'll definitely remember!