Paint A is made up from red and white paint in the ratio 1:3 and paint B is made up from red and white paint in the ratio 1:7 . The cans are the same size.
You can mix the paints to produce different shades of pink. Explain how to find the ratio of red paint to white paint if you mix one can of A with one can of B.
What is the ratio of red to white if 1 can of A is mixed with 2 cans of B? What about mixing one can of A with 6 cans of B?
What is the least number of cans of each type needed to produce pink paint containing red and white in the ratio 1:4 ?
Click here to download the MIXING PAINTS poster.
Click here to download the MIXING PAINTS worksheet.
Click here for the Notes for Teachers .
Go to the NRICH website and mix your own paint and see the colours change. This problem is adapted from the NRICH tasks Mixing Paints and Mixing More Paints with permission of the University of Cambridge. All rights reserved.
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