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Re: PS : Possible Values of X and Y [#permalink]
22 Jan 2005, 20:54

thenine wrote:

I also got D, but just by working it out. I don't know a short cut to solve it, but working it out took far less than 2 minutes

OA is D.

the possible values of lx-yl are 9, but some of the values are repetitive, therefore there are only 5 diff values. i think this is the only possible short cut way to solve this problem.
l1-2l=1
l1-3l=2
l1-6l=5

aye aye aye.....damn, how could I have screwed this one up...your right, 2 is in the same set...ma bad...if i can only stop making these stupid mistakes....ahhhhhhhhh!

MA wrote:

fresinha12 wrote:

can you guys explain your answers....

I get 6...and I dont see that option

I get the |X-Y| as 0, 1, 2, 3, 4, 5....

3-3=0 6-5=1 5-3=2 6-3=3 6-2=4 6-1=5

Sine we have | | we can neglect the other results that give +ve and -ve

fresinha,

2 is not in set x. therefore l6-2l =4 is not a value of lx-yl.