Copyright © University of Cambridge. All rights reserved.

5p, 2p and 1p coins (or a mixture of any or all of these) are used to make a total of 11p. In how many different ways can this be done?

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.**View the archive of all weekly problems grouped by curriculum topic*

View the current weekly problem