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2016-04-08T08:34:14+05:30

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When you were four years old, your sister was half your age ! Which means she was 4/2 = 2 years old! Hence the age difference between you n her is 4-2 = 2. Now that you're 100 years old she'll be younger than you by 2 years which means she is 100-2=98 years old.
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2016-04-08T08:34:45+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
When I was 4 years old, sister age is 2 years
after 96 years, I became 100 years old, 
so age of my sister will be 96+2 = 98 years
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