9. Five marks exercise problems IV

1. A man repays a loan of \(₹65,000\) by paying \(₹400\) in the first month and then increasing the payment by \(₹300\) every month. How long will it take for him to clear the loan?

 

Answer:

 

Number of months he took to repay the loan \(=\)

 

 

2. A brick staircase has a total of \(30\) steps. The bottom step requires \(100\) bricks. Each successive step requires two fewer bricks than the previous step.

(i) How many bricks are required for the topmost step?

(ii) How many bricks are required to build the staircase?

 

Answer:

 

(i) Number of bricks required for the topmost step \(=\)

 

(ii) Number of bricks required to build the staircase \(=\)