Can you work out the height of Baby Bear's chair and whose bed is
whose if all the things the three bears have are in the same
Use the ratio of cashew nuts to peanuts to find out how many
peanuts Rachel has. What would the ratio be if Rachel and Marianne
mixed their bags?
Use the Cuisenaire rods environment to investigate ratio. Can you
find pairs of rods in the ratio 3:2? How about 9:6?
A farmer is supplying a mix of seeds, nuts and dried apricots to a
manufacturer of crunchy cereal bars. What combination of
ingredients costing £5 per kg could he supply?
A decorator can buy pink paint from two manufacturers. What is the
least number he would need of each type in order to produce
different shades of pink.
Is it always possible to combine two paints made up in the ratios
1:x and 1:y and turn them into paint made up in the ratio a:b ? Can
you find an efficent way of doing this?
Jessica and Emily found many different places to hang the weights so that the scales balanced. Do you think they have found them all?
Go to last month's problems to see more solutions.
This article for teachers describes several games, found on the
site, all of which have a related structure that can be used to
develop the skills of strategic planning.
An article for teachers which discusses the differences between
ratio and proportion, and invites readers to contribute their own
A card pairing game involving knowledge of simple ratio.