Posted by **makeeda** on Saturday, January 9, 2010 at 4:05pm.

which of following is not a prime number?

A)17

B)23

C)31

D)51

- math -
**Luv4ever**, Saturday, January 9, 2010 at 5:08pm
What do you think? First of all go on to Google and look up prime numbers. You'll get a way better understanding of them in a small amount of time. I'll give you one hint: 51 is a prime number because 3 and 17 are it's factors.

- math -
**PsyDAG**, Sunday, January 10, 2010 at 5:31pm
Luv4ever has a typo.

51 is **NOT** a prime number because 3 and 17 are it's factors.

## Answer this Question

## Related Questions

- Math - Which of the following is a prime #? a.2 b.19 c.37 d.51 e.67 I choose 2. ...
- Math - ) Form a conjunction from the following two statements and determine if ...
- PROBLEM SOLVING IN MATHEMATICS - there are two prime numbers between 100 and 199...
- math - The Florida Lottery is made up of the numbers 1-49. My mother has ...
- math - The Florida Lottery is made up of the numbers 1-49. My mother has ...
- Math - Plz help dont know how to do this question. Write number 68 as a product ...
- Math Prime Numbers - Grade 7 question: I am a two-digit prime number I am one ...
- math - the florida lottery is made up of the number 1-49. my mother observed ...
- Math - The number p is the product of three different positive prime numbers ...
- IB HL Math - I need to that if there is better way to prove the following: I am ...