Compound Interest

A sum becomes ₹6,600 in 3 years at 10% p.a. compound interest, interest compounded annually. What is the principal?

• Rs.5000

• Rs.5500

• Rs.6000

• Rs.7000

Answer explanation

A sum triples itself in 12 years under compound interest. In how many years will it become 9 times?

• 18 years

• 24 years

• 30 years

• 36 years

Answer explanation

₹20,000 is invested at 5% p.a. compounded quarterly. Find the amount after 1 year.

• Rs.21000

• Rs.21025.31

• Rs.21050.94

• Rs.22000

Answer explanation

A sum amounts to ₹3,630 in 2 years and ₹3,992.40 in 3 years at compound interest. What is the rate of interest per annum?

• 8%

• 10%

• 12%

• 15%

Answer explanation

A sum becomes ₹8,820 in 2 years at 10% p.a. compounded annually. Find the sum.

• Rs.7200

• Rs.7000

• Rs.7500

• Rs.7800

Answer explanation

A sum triples in 6 years when compounded annually. In how many years will it become 81 times?

• 24 years

• 36 years

• 48 years

• 54 years

Answer explanation

₹15,000 becomes ₹19,845 in 2 years with compound interest compounded annually. Find the rate.

• 12%

• 13%

• 14%

• 15%

Answer explanation

A sum of ₹6,400 becomes ₹8,128 in 2 years with compound interest compounded half-yearly. Find the annual rate of interest.

• 10%

• 12%

• 15%

• 20%

Answer explanation

The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:

• Rs.400

• Rs.500

• Rs.600

• Rs.700

Answer explanation

The difference between simple interest and compound on Rs. 1200 for one year at 10% per annum reckoned half-yearly is:

• Rs.2

• Rs.3

• Rs.4

• Rs.5

Answer explanation