In Proportion

Current

In Proportion

These problems use contexts such as scaling a recipe, or diluting lemonade or chemical solutions, to show how proportional reasoning is used across STEM subjects.

Tray Bake link

Tray Bake 

Stage: 3 Challenge Level: Challenge Level:1

My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?

Toad in the Hole link

Toad in the Hole 

Stage: 3 Challenge Level: Challenge Level:1

Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?

Mixing Lemonade link

Mixing Lemonade 

Stage: 3 Challenge Level: Challenge Level:1

Can you work out which drink has the stronger flavour?

Investigating the Dilution Series link

Investigating the Dilution Series 

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

Which dilutions can you make using only 10ml pipettes?

Related

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. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.