Series and Sequences?

Siseko is hoping to buy a car when he turns 18. His grandmother offers to sell him her car for R131 071. He works on Saturdays only and earns R200 eve

Siseko is hoping to buy a car when he turns 18. His grandmother offers to sell him her car for R131 071. He works on Saturdays only and earns R200 every Saturday. He save's R1 on the first Saturday. Each Saturday thereafter he doubles the amount he saved on the previous Saturday. He puts the money into a bottle on his desk and not in a bank account.

In which week will his weekly payment exceed his earnings for the first time and what is the amount of the final payment he can afford?

or:Siseko is hoping to buy a car when he turns 18. His grandmother offers to sell him her car for R131 071. He works on Saturdays only and earns R200 every Saturday. He save's R1 on the first Saturday. Each Saturday thereafter he doubles the amount he saved on the previous Saturday. He puts the money into a bottle on his desk and not in a bank account. In which week will his weekly payment exceed his earnings for the first time and what is the amount of the final payment he can afford?

or:In the 9th month his weekly saving will be 256 which is more than his weekly earning for the first time. On 18th saturday he will save R131 072.So he can by that car on 18th saturday.

Tags:work,sequence,sell,series,mathematics,