Copyright © University of Cambridge. All rights reserved.

'Trick or Treat' printed from http://nrich.maths.org/

Show menu


Mrs. Smith had emptied packets of chocolate-covered mice, plastic frogs and gummi-worms into a cauldron for treats. snake.

Frog. There were 9 mice, 5 frogs and 4 worms.

Trixie was allowed to dip into the cauldron for a treat but had to do it without peeping. What treat is Trixie most likely to pick out?

Trixie wanted to be certain of pulling out at least one of each type of the treats. How many times would Trixie need to be able to dip into the cauldron to do this?

If Trixie had pulled out a mouse, would her brother Nick be more likely to pick out a mouse too, or a frog or worm instead?