Question : A certain sum doubles in 7 years at Simple Interest. The same sum under the same interest will become 4 times in how many years?

Option 1: 14 years

Option 2: 28 years

Option 3: 21 years

Option 4: 10 years

Question : A sum of money becomes double in 3 years at compound interest compounded annually. At the same rate, in how many years will it become four times of itself?

Option 1: 4 years

Option 2: 6 years

Option 3: 6.4 years

Option 4: 7.5 years

Question : At a certain rate of Simple Interest, a certain sum of money becomes double itself in 10 years. It will become triple of itself in:

Option 1: 15 years

Option 2: 18 years

Option 3: 20 years

Option 4: 30 years

Question : A sum amount doubles in 8 years by simple interest. Then the rate of simple interest per annum is:

Option 1: 10%

Option 2: 12.5%

Option 3: 15%

Option 4: 20%

Question : The simple interest on a sum of money at 10% per annum for 2 years is 8,100. Compounded annually, what would be the compound interest (in ) on the same sum for the same period at the same rate of interest?

Option 1: 8,100

Option 2: 8,505

Option 3: 8,715

Option 4: 9,000