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You may like to use our Cuisenaire rod environment for the problem below. Here is the environment (just scroll down for the problem itself):

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Here are three pairs of rods. The ratio of all the pairs is 3 : 2.

three pairs of rods in ratio 3:2

What is the ratio of the pair below?

two rods
Using only single rods what pair can you find with the same ratio as the pair below?
yellow and pink rods
Using only pairs of single rods what pairs can you find with the same ratio as those below?
orange+yellow:blue rods
Using only pairs of single rods what pairs can you find with the ratio 9 : 6?