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11 August, 01:20

A girl is 21 years old and her brother is a third her age. When the girl is 36, what will be the age of her brother?

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  1. 11 August, 01:22
    0
    The answer is twelve.
  2. 11 August, 01:32
    0
    The answer is 22 because 21:3=7 which is the brothers age so the girl is 15 years older than him because 22-7=15 so when she is 36 the boy will be 22 because 7+15=22
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