gmatready

05-30-2002, 10:54 PM

If x is a prime number, what is the value of x?

1) x<15

2) (x-2) is a multiple of 5

1) x<15

2) (x-2) is a multiple of 5

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gmatready

05-30-2002, 10:54 PM

If x is a prime number, what is the value of x?

1) x<15

2) (x-2) is a multiple of 5

1) x<15

2) (x-2) is a multiple of 5

Erin

05-30-2002, 11:16 PM

Answer: C

hello, gmatready! Welcome to TestMagic.com!

1) x<15: too many numbers; must reduce!

2) 7, 17, 37, 47, etc. are all primes and will result in a multiple of 5 if 2 is subtracted:

7-2=5

17-2=15

etc.

Therefore, both are necessary!

BTW, I will move your question to our DS section a little later, okay?

Erin

Please post further questions here.

Please search this newsgroup for FAQs.

TestMagic.com

San Francisco, CA USA

hello, gmatready! Welcome to TestMagic.com!

1) x<15: too many numbers; must reduce!

2) 7, 17, 37, 47, etc. are all primes and will result in a multiple of 5 if 2 is subtracted:

7-2=5

17-2=15

etc.

Therefore, both are necessary!

BTW, I will move your question to our DS section a little later, okay?

Erin

Please post further questions here.

Please search this newsgroup for FAQs.

TestMagic.com

San Francisco, CA USA