Jane started baby-sitting when she was 18 years old. Whenever she baby-sat for a child, that child was no more than half

[BTGmoderatorDC]

Jane started baby-sitting when she was 18 years old. Whenever she baby-sat for a child, that child was no more than half her age at the time. Jane is currently 32 years old, and she stopped baby-sitting 10 years ago. What is the current age of the oldest person for whom Jane could have baby-sat?

A. 21
B. 22
C. 23
D. 24
E. 25


OA C

Source: Manhattan Prep

[deloitte247]

Jane started babysitting when she was 18 years old.
$$The\ child\ at\ that\ time\ was\ 18\cdot\frac{1}{2}=9\ years\ old$$
The difference in years between when James started and now = 32 - 18 = 14 years.
The child's current age = 9 + 14 = 23 years old
Answer = option C

[Scott@TargetTestPrep]

Jane started baby-sitting when she was 18 years old. Whenever she baby-sat for a child, that child was no more than half her age at the time. Jane is currently 32 years old, and she stopped baby-sitting 10 years ago. What is the current age of the oldest person for whom Jane could have baby-sat?

A. 21
B. 22
C. 23
D. 24
E. 25


OA C

Solution:

Since Jane stopped babysitting at age 22, the oldest child she babysat at the time could be 11 years old. Therefore, that child’s age would be 21 now.

Answer: A