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If a and b are positive integers, what is the value of a + b

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SVP
Joined: 16 Oct 2003
Posts: 1815
Followers: 4

Kudos [?]: 50 [0], given: 0

If a and b are positive integers, what is the value of a + b [#permalink]  12 Jul 2004, 21:16
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17. If a and b are positive integers, what is the value of a + b ?

(1) a/b = 5/8
(2) The greatest common divisor of a and b is 1.
Director
Joined: 05 May 2004
Posts: 577
Location: San Jose, CA
Followers: 2

Kudos [?]: 35 [0], given: 0

Re: DS-GCD Question [#permalink]  12 Jul 2004, 22:12
Bhai wrote:
17. If a and b are positive integers, what is the value of a + b ?

(1) a/b = 5/8
(2) The greatest common divisor of a and b is 1.

C

from 1> a can be 5,10,15 ... b can be 8, 16, 24 ...

(5,8) GCD - 1
(10,16) GCD - 2
(15,24) GCD - 3
.
.
.

Hence a=5 and b=8
CIO
Joined: 09 Mar 2003
Posts: 464
Followers: 2

Kudos [?]: 34 [0], given: 0

agree on C, same explanation. With ratios, we can't know the real numbers.
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