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MathNet 2024-part-05 — 168 problems (EN–VI) Question 131

Math Olympiad Vault · MathNet 2024-part-05 — 168 problems (EN–VI)

Question 131

Let $N$ be the product of all the positive integer divisors of $42$. What is the units digit of $N$?
(A) 0 (B) 2 (C) 4 (D) 6 (E) 8