What is the remainder when \(5^{90}\) is divided by 124?

A. 25

B. 5

C. 1

D. 0

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc cgl Save WhatsApp Report

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Answer: C. 1

Answer: (C) 1

Notice 124 = 125 − 1 = \(5^3 - 1\), so \(5^3\) leaves remainder 1.

\(5^{90} = (5^3)^{30}\) leaves remainder \(1^{30}\) = 1.

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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