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# If x, y, z are integers are greater than 1, whats the value

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Joined: 06 Jul 2006
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If x, y, z are integers are greater than 1, whats the value [#permalink]

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21 Mar 2008, 18:19
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If x, y, z are integers are greater than 1, whats the value of x + y + z ?

1) xyz = 70
2)x/yz = 7 / 10

I had marked D, but its not correct.

Given than x, y, z are integers > 1, the only unique values independently by both 1) and 2) can only be 2, 5, 7. Order doesn't matter, coz we just need to get the sum.

What am i doing wrong ?
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Re: DS: X + Y + Z ? [#permalink]

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21 Mar 2008, 18:45
Statement 1:
Tells us xyz = 10, Meaning 2*5*7 = 70. Sufficient to Answer the question. Answer can be either A or D.

Statement 2 Tells us
x/yz = 7/10, x can be 70, y can be 10, z can be 10, Moreover there will be infinite possibilities to satisfy this equation. So this alone cannot answer the question.

Since you got 2, 5, 7 from statement 1 that might have lead you to think that x/yz = 7/10 is satisfied also by 2,5,7. Although that can be satisfied by numerous numbers.

Trick in DS is when you consider statement 2 then forget anything obtained from statement 1, it is big no no.

Re: DS: X + Y + Z ?   [#permalink] 21 Mar 2008, 18:45
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