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gmat bible #67 inequalities

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gmat bible #67 inequalities

by vkb16 » Thu Mar 19, 2009 1:55 am
ok.. im reallly bad at inequalities and DS, thts for sure.. neways

Qs-
If m and n are negative, is m/n <1?

1. mn<1
2. m-n<n

OA is E

I think its B.. reason being,

the second statement says m-n>n
=> m>2n
=>m/n>2

hence, we know m/n is NOT <1, its more than 2, which is also more than 1

where did i go wrong? pls explain
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by scoobydooby » Thu Mar 19, 2009 2:14 am
when you divide an inequality by a negative number you would need to flip the sign (given n is negative)

=> m>2n
=>m/n<2
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by vkb16 » Thu Mar 19, 2009 2:59 am
thanks scooby.. a careless error!
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by avenus » Thu Mar 19, 2009 5:29 am
If OA is actually E, I guess statement 2) should read m-n > n instead of m-n<n

If 2) is m-n<n as written in the original post, answer should be B:

m-n<n ==> m<2n ==> m/n>2 (n is negative) and thus we can answer the question
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