Even, Odd & Parity
Section: Number PropertiesGRE frequency: Medium-HighPro
1. Core Idea
Parity is whether an integer is even or odd. Parity questions are classification questions, not calculation questions — you never need the actual value, only whether it is even or odd.
An integer is even if it is divisible by 2 (form 2k), odd otherwise (form 2k + 1).
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