Question : A number is increased by 30% and then the increased number is decreased by 30%. The net increase or decrease is:

Option 1: 12% increase

Option 2: 9% decrease

Option 3: 15% decrease

Option 4: 30% increase

Question : The value of $\frac{3}{8}+\left[\left(\frac{4}{8} \div \frac{2}{3}\right) \times \frac{8}{5}+\frac{3}{10}\right]$ is:

Option 1: $\frac{15}{8}$

Option 2: $\frac{3}{8}$

Option 3: $\frac{3}{2}$

Option 4: $\frac{15}{2}$

Question : A number is first increased by 12% and then decreased by 12%. The change in number is:

Option 1: 1.44% increase

Option 2: 12% increase

Option 3: 12% decrease

Option 4: 1.44% decrease

Question : The population of a city increases at a rate of 5% per year. If the present population of the city is 3,70,440, its population three years ago was:

Option 1: 30,000

Option 2: 2,80,000

Option 3: 3,60,000

Option 4: 3,20,000

Question : The value of 8 + [{12 – (8 ÷ 2)} × ($\frac{1}{4}$)] is:

Option 1: 6

Option 2: 10

Option 3: 2

Option 4: 8