Question
Opal is 10 years old and Sabrina is four times as old as she is. What will be the ratio of Opal's age to Sabrina's age in 5 years' time?
3 m

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Opal is 10 years old and Sabrina is four times as old as she is. What will be the ratio of Opal's age to Sabrina's age in 5 years' time?