Copyright © University of Cambridge. All rights reserved.

'Factor Trio' printed from

Show menu

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.  

See all short problems arranged by curriculum topic in the short problems collection
This problem is taken from the UKMT Mathematical Challenges.