A Big and Little Brother
Algebra
Level
1
There was once a big brother and a small brother. When the big brother was four, the little brother was half his age. When the big brother is 100, how old is the little brother?
100
98
50
80
20
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1 solution
When the big brother was four, the little brother was half his age, which was 2 years old.
96 years later, when the big brother is 100 years old, his little brother is 98 years old.
(I wonder if anyone really chose 50?)