It's only logical
Algebra
Level
1
If the age of sister is half the age of brother. The current age of brother is 6 years. Calculate the age of sister when the age of brother will be 50 years.
The answer is 47.
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1 solution
If the brother is 6 years old now, the sister would be 6/2 = 3 years old, making the age difference 6-3 = 3 years. It is this age difference that remains the same. So when the brother is 50 years, his sister will still be 3 years younger or 50-3 = 47 years old.