Question : A number is first increased by 40% and then decreased by 25%, again increased by 15% and then decreased by 20%. What is the net increase/decrease percentage in the number?

Option 1: 7.2% decrease

Option 2: 6.4% increase

Option 3: 3.4% increase

Option 4: 3.4% decrease

Question : A man spends 75% of his income. If his income increases by 28% and his expenditure increases by 20%, then what is the increase or decrease percentage in his savings?

Option 1: 52% decrease

Option 2: 52% increase

Option 3: 13% decrease

Option 4: 13% increase

Question : Solubility of gases in liquids ______ with a decrease in temperature.

Option 1: remains constant

Option 2: first decreases and then increases

Option 3: increases

Option 4: decreases

Question : The price of a car is first increased by 35% and after that, the price is decreased by 25% due to a reduction in sales. What is the net percentage change in the final price of the car?

Option 1: Decreases by $2 \frac{1}{5}$%

Option 2: Increases by $2 \frac{1}{3}$%

Option 3: Decreases by $1 \frac{3}{5}$%

Option 4: Increases by $1 \frac{1}{4}$%

Question : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole?

Option 1: Increases

Option 2: Decreases

Option 3: Remain constant

Option 4: Will increase first then decrease