Question

Edith has nine children at regular intervals of 15 months. If the oldest is now six times as old as the youngest, how old is the youngest child?

MANY POINTS PLEASE QUICK

Answer 1

20 years

Explanation:

9=x

8=x+15

7=x+15+15

6=x+15+15+15

5=x+15+15+15+15

4=x+15+15+15+15+15

3=x+15+15+15+15+15+15

2=x+15+15+15+15+15+15+15

1=x+15+15+15+15+15+15+15+15

Xx6=6x

6x=x+15+15+15+15+15+15+15+15

6x=120

divide both sides by 6 to get X as 20

we had written the age of the youngest son as X so the youngest son is 20 years old.