SOLUTION: Dave is 6 years old his sister is half his age when he is 100 years old how old will the sister be

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Question 1087402: Dave is 6 years old his sister is half his age when he is 100 years old how old will the sister be
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The difference in their ages never changes.
Dave is 6
His sister is 3
The difference is +3+ yrs
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When Dave is 100
His sister will be +100+-+3+=+97+