Joe opens a bank account, and starts with a deposit of $100. After that he deposits $20 each week. So what is the minimum number of weeks need for Joe in order to deposit $290?

Question

Joe opens a bank account, and starts with  a deposit of $100. After that he deposits $20 each week. So what is the minimum number of weeks need for Joe in order to deposit $290?

bestpersonever123 · Answer

is the answer 14 weeks?

anonymous · Answer

So we start with $100
+ 20 = 120
+ 20 = 140
+ 20 = 160
+ 20 = 180
+ 20 = 200
+ 20 = 220
+ 20 = 240
+ 20 = 260
+ 20 = 280
+ 20 = 300 (300 ≥ 290)
(To find the answer simply add the number of weekly deposits)

A quicker way to solve this is to take the final amount we want, subtract the initial amount (290 - 100 = 190) and divide by 20. Round your answer up to the nearest whole number and you have the answer.