If m and n are integers, is m odd?
(1) n + m is odd.
(2) n + m = n^2 + 5
Can I get help in this problem please?
(1) n + m is odd.
(2) n + m = n^2 + 5
Can I get help in this problem please?
IMO -b
Stmt 1
m + n = odd
either m or n can be odd
not suff
Stmt 2
n+m=n^2+5
m=n^2+5-n
if n is odd n^2 is odd
and
odd-odd= even
but n^2 is odd
odd+even = odd
if n is even ,n^2 is even
odd -even=5-n=odd you can even take '-' values of n
and
n^2=even
even-odd or even +odd = odd
so
B is suff
