Copyright © University of Cambridge. All rights reserved.

'Beads' printed from http://nrich.maths.org/

Show menu

picture of beadsThree beads are threaded on a circular wire and are coloured either red or blue.
Can you find all four different combinations?






You now repeat the following actions over and over again:

  • between any two beads of the same colour put a red bead
  • between any two beads of different colours put a blue bead
  • then remove the original beads.
Describe what will happen to each of the combinations.

This text is usually replaced by the Flash movie.