Based on the concept of percentages in maths I have included few questions that will help to understand concept of time, distance and speed better. The percentage concept is quite easy. X % mean X/100. Otherwise to solve questions you need simple logic

The quiz goes in here.

Problem on concept on Percentages

Welcome: There are practice question based on peesrcentag . All the questions are typical of the type asked in competitive exams. Try out, if you get more than 75 % anounce yourself as Viking. If there are mistakes please do let me know

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Question 1

If the price of onion increases by 30 % and sweety plans to spend only an additional 10% on onion, by how much % will she reduce the quantity of onion purchased?

A

15

B

20

C

18

D

35

Question 1 Explanation:

If the price of onion is Rs X/kg, then after increase it will 1.3X/kg
Suppose Sweety intially used to buy Y kgs then her spend beore price increase is Rs XY. But after price increase it is 1.3XY.
If she intends to increase the spend by only 10% then suppose she buy quantity Z. i.e she wants to spend only 10 % more of XY = 1.1 XY
1.2 XY = 1.3XZ
or Z = 11/13 = 85 % (use approximation) or Sweety will have to buy 15 % less onions to keep the expense rise to 10 %

Question 2

There are 1000 chickens in a poultry farm in year May 2010. Due to normal growth the number of chicken grows by x % by next month in June 2010. Due to a disease spread in poultry many of chikens die in July 2010 at the Y %. However owner finds the chicken number reamin sames to 1000. What Can we say growth of X % in June 2010 as compared to Y% in July 2010

A

X = Y

B

X > Y

C

X < Y

Question 2 Explanation:

ust put in some value and check let say X = 10 and Y = 11
June 2010 No. of chickens are 1100, Now if July after population decrease n. of chicken is by say Y % then
1000 = 1100 - 1100 x Y/100
10/11 = 1 - Y/100
Y = 100/11
hence X > Y

Question 3

If in a college election contested by only two Ram and Shyam, Ram secured 20 % of the total votes more than Shyam. If Shyam got 400 votes, by how many votes did it lose the election?

A

400

B

600

C

200

D

250

Question 3 Explanation:

Let us assume Ram has secured X % Votes, then % Votes secured by Shyam is ( X - 15) % . Since there are only 2 parties addition of these two should amount to 100 %
X + X - 20= 100
2X = 120 or X = 60 %
Ram got 60 % votes and Shyam got 40 % Vote
If the total votes is V then Shaym 40 % is equal to 400
or V = 1000 , Ram Votes is 600 and Shaym is 400
Shaym lost by 200 votes

Question 4

Student securing 20% marks fails by 15 marks but another who gets 45% marks gets 10% more than the passing marks. What is the maximum marks?

A

150

B

100

C

200

D

50

Question 4 Explanation:

Passing cut-off mark is at 30 % ( 42 % - 12 %)
Suppose max. mark is X then as per statement
Passing mark (35 %) - 20% of max. marks fails by 10 marks
15 % of X = 15
So Max marks is 100

Question 5

Strawberry Jams are made by cooking over stove and reducing water. If the strawberry contain 40 % of water then how many strawberries need to be extracted so that 1 Kg Jam can be made with only 20 % of water content

A

5

B

2

C

7

D

4

Question 5 Explanation:

The strawberry fruit content has changed from 50 % to 85 % in Jam.
Since the pulp remain same
40 % of Strawberry = (100 - 20) % x Jam weight
Strawberry = 80 / 40 = 2 Kgs of Strawberry are required

Question 6

A coconut vendor sells 50 % of stock and discards 10 % of stock in first day. The next day he sells 30 % of the stock and disposes 50 % of stock, the next day he sells 12 % and disposes rest. How much waste did vendor threw away?

A

37 %

B

45 %

C

35

D

47

Question 6 Explanation:

Suppose the vendor has 100 coconuts
First he throws away 10 and stocks 40 for next day
2nd day he sells 12, throws away 20 and keeps 8
3rd day he sells 1 and throws away 7
So in total thew away 37 out of 100

Question 7

If the cost price of 20 articles is equal to the selling price of 16 articles, What is the percentage of profit or loss that the merchant makes?

A

50 %

B

20

C

40

D

60

Question 7 Explanation:

Let CP be 1 then 30 items cost Rs 30.00 margin be X
Then SP of 20 items = Rs 30
margin on 20 items is Rs 30 - 20 = Rs 10
margin on 1 item = 10/20 = 50 %

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