Question : Water tax is increased by 20% but its consumption is decreased by 20%. Then, the increase or decrease in the expenditure of money is:

Option 1: 5% decrease

Option 2: 4% decrease

Option 3: No change

Option 4: 4% increase

Question : The percentage change in a number when it is first decreased by 10% and then increased by 10% is:

Option 1: 0.1% increase

Option 2: 1% decrease

Option 3: 0.1% decrease

Option 4: No changes

Question : The length and breadth of a cuboid are increased by 20% and 25%, respectively, while its height is reduced by 30%. What must be the total percentage increase/decrease in the volume of the cuboid?

Option 1: Increase by 5%

Option 2: Increase by 3%

Option 3: Decrease by 2%

Option 4: Decrease by 4%

Question : The cost price of an article is decreased by 10% and then increased by 20%. If the final price is INR 540, then the original cost price is:

Option 1: INR 500

Option 2: INR 650

Option 3: INR 550

Option 4: INR 600

Question : The arithmetic mean of the following numbers
1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7 is:

Option 1: 4

Option 2: 5

Option 3: 14

Option 4: 20