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2016 AMC 12B Question 24

AMC12 · 2016 AMC 12B

Question 24

There are exactly $77{,}000$ ordered quadruples $(a,b,c,d)$ such that $\gcd(a,b,c,d)=77$ and $\text{lcm}(a,b,c,d)=n.$ What is the smallest possible value of $n?$
  1. $13{,}860$
  2. $20{,}790$
  3. $21{,}560$
  4. $27{,}720$
  5. $41{,}580$