A boy is four years old and his sister is three times as old as he is. When the boy is 12 years old, how old will his sister be?
2006-09-09 06:42:47 · 41 answers · asked by Caroline T 1 in Science & Mathematics ➔ Mathematics
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2006-09-09 06:44:01 · answer #1 · answered by julez 6 · 0⤊ 0⤋
The answer is 20 years old.
If the boy is 4 years and his sister is 3 times older than his age, she would be 12 years old. (4 x 3 = 12).
So you add on 8 years to get the answer.
(12 + 8 = 20 years).
2006-09-09 06:46:32 · answer #2 · answered by gunnerboycelt 2 · 0⤊ 0⤋
20 years old. If the sister is 3 times the age of her 4 year old brother she is 12 (3 x 4 = 12). It will take him 8 years to reach age 12 so she will be 20 (8 + 12 = 20).
2006-09-09 06:44:09 · answer #3 · answered by Hidden .38 3 · 0⤊ 0⤋
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2006-09-10 21:17:41 · answer #4 · answered by sylvi 1 · 0⤊ 0⤋
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2006-09-09 06:50:16 · answer #5 · answered by The Way 4 · 0⤊ 0⤋
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2006-09-09 06:46:26 · answer #6 · answered by Anonymous · 0⤊ 0⤋
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2006-09-09 06:45:04 · answer #7 · answered by Vinni and beer 7 · 0⤊ 0⤋
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2006-09-09 06:44:54 · answer #8 · answered by Anonymous · 0⤊ 0⤋
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2006-09-09 06:44:30 · answer #9 · answered by welsh_witch_sally 5 · 0⤊ 0⤋
20 years
2006-09-11 03:17:32 · answer #10 · answered by SUJI.K 1 · 0⤊ 0⤋