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

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If a and b are positive integers, what is the value of a + b [#permalink] New post 12 Jul 2004, 22:16
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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.
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Re: DS-GCD Question [#permalink] New post 12 Jul 2004, 23:12
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
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 [#permalink] New post 13 Jul 2004, 06:30
agree on C, same explanation. With ratios, we can't know the real numbers.
  [#permalink] 13 Jul 2004, 06:30
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