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

Option 1: 6

Option 2: 10

Option 3: 2

Option 4: 8

Question : If p : q : r = 2 : 5 : 3 and r : s = 6 : 5, then what is the value of p : q : r : s?

Option 1: 4 : 12 : 7 : 3

Option 2: 4 : 10 : 6 : 5

Option 3: 6 : 5 : 8 : 10

Option 4: 8 : 12 : 7 : 8

Question : A number is increased by 20% and then the increased number is decreased by 20%. The net increase or decrease is:

Option 1: Decrease 2%

Option 2: Increase 4%

Option 3: Increase 2%

Option 4: Decrease 4%