Stage: 2 Short Challenge Level: 
Only one side of a two-slice toaster is working, so when two slices of bread go in side-by-side, each slice is toasted on one side after 2 minutes, but not on the other.
What is the quickest way to toast both sides of three slices of bread?
What about four slices? Five slices?
Visualising. Factors and multiples. Multiplication & division. Addition & subtraction. Generalising. Interactivities. Combinations. Working systematically. Practical Activity. Investigations.
Published February 1999.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk