31.

A sum of money lent at compound interest amounts to Rs. 1460 in 2 years and to Rs. 1606 in 3 years. The rate of interest per annum is

• 12%

• 11%

• 10.5%

• 10.5%

The compound interest on Rs. 6250 at 12% per annum for 1 year, compound half-yearly is

• Rs 772.50

• Rs. 772

• Rs. 672.50

• Rs. 672.50

A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times of itself at the same rate of interest in

• 20 years

• 10 years

• 12 years

• 15 years

A sum of money is paid back in two annual instalments of Rs. 17,640 each, allowing 5% compound interest compounded annually. The sum borrowed was

• ₹ 32,800

• ₹ 32,200

• ₹ 32,000

• ₹ 32,400

A man invested a sum of money at compound interest. It amounted to Rs. 2420 in 2 years and to Rs. 2662 in 3 years. Find the sum.

• Rs. 1000

• Rs. 2000

• Rs. 5082

• Rs. 5082

The compound interest on Rs.30,000 at 7% per annum for n years is Rs. 4347. The value of n is

• 3

• 2

• 4

• 4

The compound interest on â‚¹ 24,000/- at 10% per annum for  interest being compounded semi-annually is

• ₹ 3,783

• ₹ 3,777

• ₹ 3,780

• ₹ 3,781

What would be the compound interest of â‚¹ 25,000/- for 2 years at 5% per annum?

• ₹ 2,500

• ₹ 2,562.5

• ₹ 2,425.25

• ₹ 5,512.5

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is â‚¹ 1/-. The sum (in ₹) is:

• ₹ 620/-

• ₹ 630/-

• ₹ 640/-

• ₹ 625/-

The compound interest on Rs 1,000/- at 10% per annum for 3 years (in Rs) is:

• Rs. 1,331/-

• Rs. 331/-

• Rs. 300/-

• ^{Rs. 1,300/-}