Lessons

General Aptitude
12.1 Surds and Indices - General Questions

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Q.

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

View Answer

Correct choice: A

Explanation:

5a = 3125    ⇔    5a = 55

a = 5.

∴ 5(a - 3) = 5(5 - 3) = 52 = 25.

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