Question : At the same rate of simple interest sum of the interest of Rs. 300 for 4 years and the interest of Rs. 400 for 3 years is 120. The rate of interest is:

Option 1: 5%

Option 2: 4%

Option 3: 6%

Option 4: 10%

Question : If the period increases by 5 years, then simple interest increases by Rs. 3600 on a sum of Rs. 6000. What is the annual rate of interest?

Option 1: 15 percent

Option 2: 12 percent

Option 3: 12.5 percent

Option 4: 10 percent

Question : A sum was invested on simple interest at a certain rate for 2 years. If the interest rate is increased by 4%, then the interest increases by Rs. 160. What is the sum (in Rs.) invested?

Option 1: 2000

Option 2: 3000

Option 3: 3500

Option 4: 4000

Question : The growth rate of population refers to the:

Option 1: Difference between birth rate and GDP

Option 2: Addition of birth rate and death rate

Option 3: Difference between birth rate and death rate

Option 4: Difference between death rate and GDP

Question : The simple interest received on a sum is $\frac{4}{9}$ of the sum. The number of years is equal to the annual rate of interest. What is the annual rate of interest?

Option 1: 7.5%

Option 2: 6.66%

Option 3: 6%

Option 4: 5.25%