Question

If A kid was 5 years old when her brother was just born, when the kid turns 15 how old would the baby brother be?
I would think 5 or 10 but my brain is fried

Answer 1

The answer is 10 because when the kid turns 6 the brother would be 1 and when the kid is 7 the brother will be 2 and so on. or you can subtract 15-5