Question

A girl is three years old and her brother is three times as old as she is. When the girl is 7 years old, how old will her brother be"​

Answer 1

Answer:

Let the girl age is 3

Then her brother age is 3×3=9

So, when the girl is 7

Then her brother age is 13

HOPE IT IS CORRECT

Answer 2

Answer:

Her brother will be 13 years old when the girl is 7 years old.

Explanation:

• Step 1: To find the brothers current age, we multiply 3 times 3, which is equal to 9

• Step 2:  Currently, the girl is 3 years old. When she is 7, four years will have passed as 3+4=7

• Step 3: Thus in four years, her brother will be 9+4=13 years of age