The ratio of red marbles to the total number of marbles is 2 : 5. If there are 10 red marbles, what is the total number of marbles?, 20, 25, The ratio of cats to dogs in a pet shop is 4 : 7. If there are 28 dogs, how many cats are there?, 16, 24, The ratio of apples to bananas is 7 : 3. If there are 21 apples, how many bananas are there?, 18, 9, A zoo has 24 lions and 8 tigers. What is the ratio of lions to tigers?, 24 : 8, 8 : 24

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