Question 5
Modular ArithmeticEvaluate 23 × 54 (mod 7).
- A.2
- B.3
- C.5
- D.6
Show the answer and explanation
Answer: B (3)
Explanation
23 ≡ 2 and 54 ≡ 5 (mod 7), so the product ≡ 10 ≡ 3 (mod 7).
Evaluate 23 × 54 (mod 7).
Answer: B (3)
23 ≡ 2 and 54 ≡ 5 (mod 7), so the product ≡ 10 ≡ 3 (mod 7).