GRE Exam Numerical Ability Number System

If p is a negative even integer and pq is a negative odd integer, then q must be: A) Positive even integer B) Negative even integer C) Positive fraction D) Negative fraction E) None of these

Read Solution (Total 1)

consider p as small positive even integer as -2
rule is even*odd = even
for example consider -2*3=-6 it is negative even
so to become odd it want to be a positive fraction
for example if we consider q as 1.5
then -2*1.5=-3 which is negative odd integer
then the option is c
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GRE Other Question

Given an alphabet of 26 letters with 21 consonants and 5 vowels, how many three-letter words can be formed with a vowel as the first letter and a consonant as the last letter ? A) 1560 B) 2730 C) 2205 D) 3380 If x is divisible by 78 and x is non-zero, then which of the following must be divisible by x ?
A) x/78 B) x+78 C) 78/x D) 78-x E) 78x+78