# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #1 2007-10-18 14:47:28

shivusuja
Member
Registered: 2006-09-14
Posts: 56

### sequences and series

A farmer buys a used tractor for Rs 12000. He pays Rs 6000 cash and agrees to
pay the balance in annual instalments of Rs 500 plus 12% interest on the unpaid
amount. How much will the tractor cost him?

Offline

## #2 2007-10-18 17:57:25

landof+
Member
Registered: 2007-03-24
Posts: 131

### Re: sequences and series

find the 12% interest for the first payment...

1) amt needed to pay
12000-6000
=6000

2) no. of installments
6000/500
=12

continue.... it should be obvious from here.

I shall be on leave until I say so...

Offline

## #3 2007-10-18 22:54:05

shivusuja
Member
Registered: 2006-09-14
Posts: 56

### Re: sequences and series

sir

the sum is from sequences and series. i should follow the progression method. so is it in a.p or g.p? how to start?

Offline