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xy = 1200

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xy = 1200

by Brent@GMATPrepNow » Fri Jan 02, 2009 2:58 pm
If x and y are integers such that xy = 1200, then what is the value of x+y?

(1) x/y is an odd integer
(2) x/y is an integer that is less than 15
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by cramya » Fri Jan 02, 2009 3:25 pm
I would say E)

since x and y can be both positive or both negative and this changes the value of x+y

P.S: I may be off but dint go in to the details since there is a possibility that I stated above could exist even after we figure out the numbers based on stmt I and II by themselves or together .



+20 or -20 for taking an educated guess :-)
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by cramya » Fri Jan 02, 2009 3:46 pm
Take 60,20

It can be -60 and -20

x+y = 80 or -80

INSUFF

Choose E)
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by Brent@GMATPrepNow » Fri Jan 02, 2009 4:00 pm
Sorry for the delay - nice to keep these forums fresh!
Yes, nice work cramya.
Looks like I'll have to dig a lot deeper to stump you :D
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by logitech » Fri Jan 02, 2009 7:04 pm
cramya wrote:Take 60,20

It can be -60 and -20

x+y = 80 or -80

INSUFF

Choose E)
For example, I like your plugging number method at this problem. Good job!
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