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3 August, 12:14

Philip can do 15 math problems in 5 minutes. How long will it take him to do 21 problems?

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  1. 3 August, 16:04
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    It takes him 7 minutes to do 21 problems

    Step-by-step explanation:

    15/5=3

    He did 21 problems

    So you would then do ...

    21/3=7
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