Question : A certain sum becomes 7 times in 8 years at Simple Interest, then in how many years will it become 19 times of itself?

Option 1: 15

Option 2: 18

Option 3: 28

Option 4: 24

Question : If a certain sum becomes 3 times in 6 years at compound interest, then in how many years, it will become 81 times?

Option 1: 81 years

Option 2: 162 years

Option 3: 27 years

Option 4: 24 years

Question : If a certain sum becomes two times in seven years at Compound Interest, then in how many years will it become eight times?

Option 1: 14 years

Option 2: 21 years

Option 3: 28 years

Option 4: 35 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 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