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set of numbers

Expert replies
by PAB2706 » Sun May 17, 2009 4:28 am
The set S of numbers has the following properties:

I) If x is in S, then 1/x is in S.
II) If both x and y are in S, then so is x + y.

Is 3 in S?

(1) 1/3 is in S.
(2) 1 is in S.
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Source: — Data Sufficiency |

by aj5105 » Sun May 17, 2009 7:41 am
I would go with (B)
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by dumb.doofus » Sun May 17, 2009 5:33 pm
Stmt I: 1/3 is in S. .that would mean 3 is in S. This is based upon the first axiom. so Sufficient.

Stmt II: 1 is in S, implies 1/1 is in S too.. i.e. 1. this would imply 1+1 = 2 is in S too.. Since 1 and 2 are in S, therefore 3 is in S too.
Sufficient

Answer: D
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by cramya » Sun May 17, 2009 6:22 pm
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by PAB2706 » Sun May 17, 2009 7:56 pm
thank you..this is exactly what i was looking for..even i thot that the second statement is misleading....

cheers!!!
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