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If A and B are positive integers, is A – B even?
(1) The product of A and B is even
(2) A + B is odd
20 Feb 2020, 01:47
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A-B is even when A and B are both Even or Odd
(1) A*B Even when bot even or both are different
(2) A+B Odd when both are different in which case A-B is Odd sufficient
Answer B
(1) A*B Even when bot even or both are different
(2) A+B Odd when both are different in which case A-B is Odd sufficient
Answer B
20 Feb 2020, 02:13
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A-B ; even possible when both a& b are either even or odd
#1
The product of A and B is even
possible either both a & b are even or either of a & b is even and other is odd ; insufficient
#2
A + B is odd
possible when either of a & b is even and other is odd ; so therefore a-b is not even;
sufficient
IMO B
If A and B are positive integers, is A – B even?
(1) The product of A and B is even
(2) A + B is odd
#1
The product of A and B is even
possible either both a & b are even or either of a & b is even and other is odd ; insufficient
#2
A + B is odd
possible when either of a & b is even and other is odd ; so therefore a-b is not even;
sufficient
IMO B
If A and B are positive integers, is A – B even?
(1) The product of A and B is even
(2) A + B is odd
