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### Question

If $p^q = 25$, then what could be $(p - 1)^(q + 1)$?

**A**

64.

**B**

65.

**C**

63.

**D**

66.

**Soln.**

**Ans: a**

By inspection we can see that p = 5, q= 2. So $(5 - 1)^(2 + 1)$ will be $4^3$, i.e., 64.