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LunaticAnagha
- Junior | Next Rank: 30 Posts
- Posts: 17
- Joined: Tue Feb 17, 2009 2:32 am
- Location: Pune
- GMAT Score:670
Positive integers X, Y and Z are such that; X is a factor of Y and Y is a factor of Z. Is Z even?
1. XZ is even
2.Y is even
ANSWER: Each statement alone is sufficient.
I understand if Y is even as Z has to be even as its a multiple of Y. But how is statement 1 sufficient? Any quick explanation?
ALSO
If X is positive which of the following can be correct orders:
1.X^2<2X<1/X
2.X^2<1/X<2X
3.2X<X^2<1/X
ANSWER: 1 and 2 both are correct.
1 is clear. How is 2 correct? Even if I plug Integers or Fractions, its not giving me order no 2.
Please HELP!!!
1. XZ is even
2.Y is even
ANSWER: Each statement alone is sufficient.
I understand if Y is even as Z has to be even as its a multiple of Y. But how is statement 1 sufficient? Any quick explanation?
ALSO
If X is positive which of the following can be correct orders:
1.X^2<2X<1/X
2.X^2<1/X<2X
3.2X<X^2<1/X
ANSWER: 1 and 2 both are correct.
1 is clear. How is 2 correct? Even if I plug Integers or Fractions, its not giving me order no 2.
Please HELP!!!
