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 : When iron rusts, its weight

Option 1: decreases

Option 2: increases

Option 3: remains the same

Option 4: first increases and then decreases

Question : If a speed of rotation of the earth increases, the weight of the body

Option 1:

Option 2:

Option 3:

Option 4:

Question : The ratio between monthly income and expenditure of Vaidic is 8 : 5. If his income increases by 20% and his expenditure increases by 30%, then find the percentage increase or decrease in his monthly savings.

Option 1: $5 \frac{2}{3}$% increase

Option 2: $5 \frac{2}{3}$% decrease

Option 3: $3 \frac{1}{3}$% increase

Option 4: $3 \frac{1}{3}$% decrease

Question : A saves 35% of his income. If his income increases by 20.1% and his expenditure increases by 20%, then by what percentage do his savings increase or decrease? (correct to one decimal place)

Option 1: 18.5% of decrease

Option 2: 21.9% of increase

Option 3: 20.3% of increase

Option 4: 19.75% of decrease