What is the highest common factor of positive integers u and : DS Archive
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# What is the highest common factor of positive integers u and

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What is the highest common factor of positive integers u and [#permalink]

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06 Apr 2004, 17:59
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What is the highest common factor of positive integers u and v?

A)u and v are consecutive integers.
B)v is a prime number.
Senior Manager
Joined: 23 Sep 2003
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08 Apr 2004, 08:37
Yeah, A it is.

1 is the common factor between any two positive integers.
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08 Apr 2004, 08:46
Yes, A.

I almost chose D until I realized my mistaken reasoning. I'm not good with number theory questions.
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22 May 2004, 04:09
any other members want to explain?
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22 May 2004, 14:52
A)u and v are consecutive integers.
GCD of any two consecutive integers is always 1
(Sufficient)

B)v is a prime number.
if v = 7 and u = 14 then GCD = 7
if v = 11 and u = 22 then GCD = 11
(Insufficient)
22 May 2004, 14:52
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