These are sample practice MCQs created for exam preparation. These are NOT official exam questions.
What is the remainder when 5^123 is divided by 4?
Question:
What is the remainder when 5^123 is divided by 4?
What is the remainder when 5^123 is divided by 4?
Options
Answer: (B) 1
Explanation:
Powers of 5 modulo 4: 5 ≡ 1 (mod 4). Therefore 5^123 ≡ 1^123 ≡ 1 (mod 4). Remainder is 1.
Explanation:
Powers of 5 modulo 4: 5 ≡ 1 (mod 4). Therefore 5^123 ≡ 1^123 ≡ 1 (mod 4). Remainder is 1.
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