mgmatds1
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Source: Beat The GMAT — Data Sufficiency |
for m+n to be odd one has to be even the other odd
from 1
m = p^2 + 4p+4 ( m can be either even or odd depending on p)..insuff
from 2
n = p^2 + 2m+1
insuff
both
m-n = 4p-2m+3 ( even -even +odd = odd)
m-n is odd however ( even - odd = odd or odd - even = odd)
thus C
from 1
m = p^2 + 4p+4 ( m can be either even or odd depending on p)..insuff
from 2
n = p^2 + 2m+1
insuff
both
m-n = 4p-2m+3 ( even -even +odd = odd)
m-n is odd however ( even - odd = odd or odd - even = odd)
thus C
