SOLUTION: A 6 year old boy wants to ride an adult go-karts but is not tall enough. His sister is twice as old as he is and rides a lot. The little boy finally turns 12 and is now old enough

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Question 674612: A 6 year old boy wants to ride an adult go-karts but is not tall enough. His sister is twice as old as he is and rides a lot. The little boy finally turns 12 and is now old enough to ride the adult go-karts. How old is his sister?
Answer by solver91311(24713) About Me  (Show Source):
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When the boy is 6, the sister is twice as old, so she is 12. When the boy is 12 it is 6 years later, so the sister has to be 12 + 6 = 18.

John

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