Question

Jaylen and six of her younger siblings have ages that are consecutive. When they moved from San Francisco to Chicago, their ages (all seven of them) added up to 91. How old was Jaylen when they moved? Explain your thinking.

Answer 1

Jaylen was 16 years old. She's the oldest.

Explanation:

16 Jaylen

15 sibling 1

14 sibling 2

13 sibling 3

12 sibling 4

11 sibling 5

10 sibling 6

____________

91 Total

My thinking was that I started out dividing 91 by 7. That came out 13. So I knew the oldest one had to be older than 13.