Surds and Indices - Arithmetic Aptitude Questions and Answers - Discussion

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Discussion :: Surds and Indices

If 5^a = 3125, then the value of 5^{(a - 3)} is:

A.

25

B.

125

C.

625

D.

1625

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Answer : Option A

Explanation :

5^a = 3125 5^a = 5⁵

a = 5.

5^{(a - 3)} = 5^{(5 - 3)} = 5² = 25.

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