Factor trio
Which of the numbers shown is the product of exactly 3 distinct prime factors?
Age
11 to 14
Challenge level
Problem
Which of the following numbers is the product of exactly $3$ distinct prime numbers?
$45$, $60$, $91$, $105$, $330$
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
Student Solutions
Answer: $105$
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