If a and b are integers and a − b is even, which of the following must always…
GATE · 2017 · ME · Set 2 · General Aptitude
If a and b are integers and a − b is even, which of the following must always be even?
- A.
ab
- B.
a2 + b2 + 1
- C.
a2 + b + 1
- D.
ab − b
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