Question

My goal is to collect 350 cans. I collected 20 cans the first week. Each week I collect 10 more than my previous week. How many weeks do I take to collect all my 350 cans ?

Answer 1

8 weeks

Explanation:

week 1: 20

week 2: 30

week 3: 40

week 4: 50

week 5: 60

week 6: 70

week 7: 80

Answer 2

350 - 20
————- = 33 weeks.
10

It will take 33 weeks to reach the goal of 350 cans.