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06 Nov 2004, 14:45
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Another gem from the archives
1/X+1/Y=36/323. Find X-Y.
(1) X and Y are primes
(2) X>Y>1
1/X+1/Y=36/323. Find X-Y.
(1) X and Y are primes
(2) X>Y>1
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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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06 Nov 2004, 15:41
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I will go with B.
1/X + 1/Y =36/323
=>(X+Y)/XY = 36/323
'323' is I think key here and is 17*19. Now which one is X and which Y.
1. X & Y are primes. But which one? So, Insuff.
2. X>Y>1. Great X=19, Y=17. So, X-Y = 2. So, B.
1/X + 1/Y =36/323
=>(X+Y)/XY = 36/323
'323' is I think key here and is 17*19. Now which one is X and which Y.
1. X & Y are primes. But which one? So, Insuff.
2. X>Y>1. Great X=19, Y=17. So, X-Y = 2. So, B.
06 Nov 2004, 16:45
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I actually went for C.
I could figure out 17 and 19 and then went on to the next statement to figure out that the X was 19.
It never striked to me...that B could be sufficient.
Venks,Paul..You guyz are great.
I could figure out 17 and 19 and then went on to the next statement to figure out that the X was 19.
It never striked to me...that B could be sufficient.
Venks,Paul..You guyz are great.
