16) Two numbers are respectively 20% and 50% of a third number. What percent is the first number of the second?

• (a) 10%
• (b) 20%
• (c) 30%
• (d) 40%

17) Two numbers are respectively 25% and 20% less than a third number. What percent is the first number of the second?

• (a) 5%
• (b) 75%
• (c) 80%
• (d) 93.75%

18) A supply of juice lasts for 35 days. If its use is increased by 40%, the number of days the same amount of juice lasts is:

• (a) 25 days
• (b) 30 days
• (c) 24 days
• (d) 27 days

19) If 60% of A = 30% of B, B = 40% of C, C = x% of A, then value of x is:

• (a) 200
• (b) 500
• (c) 800
• (d) 300

20) Due to 25% fall in the rate of eggs, one can buy 2 dozen eggs more than before by investing Rs.162. Then the original rate per dozen of the eggs is:

• (a) Rs. 22
• (b) Rs. 24
• (c) Rs. 27
• (d) Rs. 30

21) A number is increased by 20%. To get back to the original number, the increased number is to be reduced by:

• (a) 20%
• (b) 21%
• (c) 16\( \frac{2}{3} \)%
• (d) 14\( \frac{1}{3} \)%

22) A village lost 12% of its goats in a flood and 5% of the remainder died from diseases. If the number left now is 8360, what was the original number before the flood?

• (a) 1000
• (b) 10000
• (c) 1,00,000
• (d) 8360

23) In a school there are 1500 students, 44% of them are girls. Monthly fee of each boy is Rs. 540 and the fee of each girl is 25% less than that of a boy. The sum of fees of boys and girls both is:

• (a) Rs. 720600
• (b) Rs. 720800
• (c) Rs. 720900
• (d) Rs. 721000

24) Refer the following data table and answer the following question:

What per cent of students who chose Engineering are girls?

• (a) 26.32
• (b) 12.5
• (c) 25
• (d) 33.33

25) A boy found the answer for the question “subtract the sum of \( \frac{1}{4} \) and \( \frac{1}{5} \) from unity and express the answer in decimals” as 0.45. The percentage of error in his answer was:

• (a) \( \frac{100}{11} \)%
• (b) 50%
• (c) 10%
• (d) \( \frac{200}{11} \)%