Challenge Level

'Saturn' chocolate bars are packed in boxes of either 5 or 12.

What is the smallest number of full boxes required to pack exactly 2005 'Saturn' bars?

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

This problem is taken from the UKMT Mathematical Challenges.

You can find more short problems, arranged by curriculum topic, in our short problems collection.