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Blackcurrantiest

Age 5 to 7
Challenge Level Yellow starYellow starYellow star
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Blackcurrant drinks of various concentrations

Lizzie's Dad is making some blackcurrant squash for Lizzie and her friends.

A purple rectangle stands for a measure of blackcurrant and a white rectangle for a measure of water:

purple rectangle = blackcurrant, white rectangle = water

Can you decide which of these drinks, when mixed, will be the blackcurrantiest? (In other words, which one will have the strongest blackcurrant taste.)

one purple and two white rectangles   two purple and one white rectangle
one purple and one white rectangle   one purple and three white rectangles

Order the drinks from the blackcurrantiest to the one which would have the least blackcurrant flavour.
Can you explain why you have put them in that order?

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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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