All numbers divisible by both 4 and 15 are also divisible by which of the following?

A. 6

B. 8

C. 18

D. 24

E. 25

explain please thanks

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- Aug 13th 2011, 06:37 AMRK29SAT question
All numbers divisible by both 4 and 15 are also divisible by which of the following?

A. 6

B. 8

C. 18

D. 24

E. 25

explain please thanks - Aug 13th 2011, 06:43 AMe^(i*pi)Re: SAT question
The LCM of 4 and 15 is 60.

So which of those numbers is a factor of 60? - Aug 13th 2011, 06:46 AMRK29Re: SAT question
- Aug 13th 2011, 07:29 AMe^(i*pi)Re: SAT question
- Aug 13th 2011, 08:05 AMRK29Re: SAT question
what's a quick way to find LCM and GCF? i am having hard time.

- Aug 13th 2011, 08:06 AMe^(i*pi)Re: SAT question
LCM and GCF

Prime factors are the easiest way, the link above explains it better than I can - Aug 13th 2011, 08:10 AMRK29Re: SAT question
I learned that way when i was young, they complicated stuff over years