Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).
AlgebraExponents and Powers
If $n$ is a natural number, then $9^{2n} - 4^{2n}$ is always divisible by:
- A.$5$ only
- B.$13$ only
- C.Both $5$ and $13$Correct answer
- D.Neither $5$ nor $13$
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Practice these MCQs in the appQuick fact: $9^{2n} - 4^{2n}$ is always divisible by both $5$ and $13$ for any natural number $n$.