Q1. 0.05 is what % of 0.5?
Q2. One liter of water evaporates from 6 liters of sea water containing 4% salt. Find the % of salt in the remaining solution?
Salt in sea water = 4% × 6 = .24
After evaporation of 1L of sea water remaining water is = 5 liters
Required % of salt in the remaining solution =.24/5=4.8%
Q3. In an election with only two contestants the candidates who gets 30% of the votes polled is defeated by 15000 votes. What is the number of votes polled?
Let the total vote polled = 100x
According to question,
70x – 30x = 15000
x = 375
So, total vote polled = 37500
Q4. If in a fraction, numerator is increased by 200% and denominator by 500%, then the new fraction is what % of previous fraction?
Q5. To a sugar solution of 3 liters containing 40% sugar, one liter of water is added. Find the percentage of sugar in new solution?
Q6. If the price of a computer is reduced by 20% and the sale is increased by 80%, by what percent the net revenue is increased?
Q7. If the height of cone is increased by 200%. what is the percentage increase in the volume?
Q8. The length of a rectangle is increased by 20% and breadth is decreased by 20%. What is the percentage change in area?
(a) 4% decrease
(b) 4% increase
(c) No change
(d) 1% increase
Q9. A’s income is 25% more than B’s. How much is B’s income less than that of A?
(c) 33 1/3%
Q10. a% of b is b% of:
Q11. A student multiplied a number by 3/5 instead of 5/3. What is the percentage error in calculation?
Q12. The value of machine is depreciated at the rate of 10% per annum. What is its value after 2 years, if its present value is Rs. 2,00,000?
(a) Rs. 131220
(b) Rs. 162000
(c) Rs. 232000
(d) Rs. 150000
Q13. If x% of y is 200 and y% of z is 800, then find a relation between x and z
(a) 2x = z
(b) 4x = z
(c) 3x = z
(d) x = z
Q14. The price of wheat falls by 25%. By what percentage a person can increase the consumption of wheat so that his overall budget does not change?
Q15. A person spends 75% of his salary on household affairs and 15% on conveyance, saving the remainder. If his saving at the end of the year be Rs. 6396, what is his annual salary?
(a) Rs. 63960
(b) Rs. 78100
(c) Rs. 65300
(d) Rs. 89800