A task involving the equivalence between fractions, percentages and decimals which depends on members of the group noticing the needs of others and responding.
A 750 ml bottle of concentrated orange squash is enough to make fifteen 250 ml glasses of diluted orange drink. How much water is needed to make 10 litres of this drink?
An activity based on the game 'Pelmanism'. Set your own level of challenge and beat your own previous best score.