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least possible value?

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least possible value? [#permalink] New post 06 Jan 2011, 18:26
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I don't have the options but want to know the answer

One set S contains all negative numbers, factors of 16 and another set T contains all negative numbers,factors of 8.A number x is chosen from set S and another number y is from set T.What is the least possible value of x-y?
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Re: least possible value? [#permalink] New post 06 Jan 2011, 23:03
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vjsharma25 wrote:
I don't have the options but want to know the answer

One set S contains all negative numbers, factors of 16 and another set T contains all negative numbers,factors of 8.A number x is chosen from set S and another number y is from set T.What is the least possible value of x-y?



To minimize x-y, we need to minimize x and maximize y

Minimum x we can choose is -16
Maximum y we can choose is -1

So minimum x-y is -15
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Re: least possible value?   [#permalink] 06 Jan 2011, 23:03
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