Maths · Ratio & Proportion
Ratio Mixer
Mix blackcurrant squash and water in the ratio 1 : 3.
Free to use and free to share. There is no sign-up, no score, and nothing a child does here is recorded or sent anywhere. What you may do with it, in full.
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Why this works
A ratio fixes the RECIPE, not the amount. 1:3 and 3:9 are the same drink because both are "one part squash for every three parts water" - the colour proves it. To scale a recipe, work out how many whole lots of the ratio you need lots) and multiply every part by that.
Helping a child through Ratio Mixer
It runs in 2 steps
- 1. Mix the flavour. Mix blackcurrant squash and water in the ratio 1 : 3.
- 2. Party jug. Same flavour, bigger jug: fill 12 units and make it taste identical.
Hints, least revealing first
- Tap a tap to pour ONE unit. The recipe card shows how many of each you need.
- 1 : 3 means for every 1 part squash there are 3 parts water - 4 parts of liquid altogether.
- For the party jug, ask: how many lots of 4 fit into 12? Pour that many lots of the recipe.
When they finish it: “Tastes exactly right!”
11+ skill this exercise practises
It has its own page, with a worked example on it.
All maths 11+ skillsYou can reuse this. Here is exactly how far that goes
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Ratio Mixer practises one skill. Maths has 55 of them
A free diagnostic covers every maths skill and the other three subjects, and comes back with a shortlist rather than a list.