Welcome to Online Quant Test in AffairsCloud.com. We are starting Railway RRB 2016 and we are creating sample questions in Quant section, type of which will be asked in Railway RRB 2016!!!

You have already completed the quiz before. Hence you can not start it again.

Quiz is loading...

You must sign in or sign up to start the quiz.

You have to finish following quiz, to start this quiz:

Results

0 of 10 questions answered correctly

Your time:

Time has elapsed

You have reached 0 of 0 points, (0)

Categories

Quantitative Aptitude0%

1

2

3

4

5

6

7

8

9

10

Answered

Review

Question 1 of 10

1. Question

1 points

Category: Quantitative Aptitude

A 80 litres solution of milk and water contains 80% milk. 10 litres of this mixture is replaced by 10 litres of milk. What is the percentage of water in the final mixture?

Correct

Explanation:
When 10 litres taken out, solution left = 80-10 = 70
So milk left in solution = 80/100 *70 = 56
And water left = (20/100)*70 = 14
now 10 litres of milk poured in, so there is no change in quantity of water, and total mixture again becomes 80l
so water now is 14/80 * 100 = 17.5%

Incorrect

Explanation:
When 10 litres taken out, solution left = 80-10 = 70
So milk left in solution = 80/100 *70 = 56
And water left = (20/100)*70 = 14
now 10 litres of milk poured in, so there is no change in quantity of water, and total mixture again becomes 80l
so water now is 14/80 * 100 = 17.5%

Question 2 of 10

2. Question

1 points

Category: Quantitative Aptitude

A sum of money is lent for 2 years at 20% p.a. compound interest. It yields Rs 43.38 more when compounded semi-annually than compounded annually. What is the approximate sum lent?

80% of 120 added to 60% of a number is number itself. Find the number.

Correct

Explanation:
(60/100)*x + (80/100)*120 = x
So 96 = (40/100)*x
Solve, x = 240

Incorrect

Explanation:
(60/100)*x + (80/100)*120 = x
So 96 = (40/100)*x
Solve, x = 240

Question 4 of 10

4. Question

1 points

Category: Quantitative Aptitude

Four years ago, ratio of ages of Arun and Tarun was 9 : 11. 6 years hence the ratio will be 7 : 8 respectively. Find the sum of the present ages of the two.

Correct

Explanation:
9x and 11x
4+6 = 10 yrs
So (9x+10)/(11x+10) = 7/8
Solve, x = 2
Their ages 4 yrs ago – 18 and 22, so after 4 yrs (Or present age) = 22 and 26
So sum = 22+26

Incorrect

Explanation:
9x and 11x
4+6 = 10 yrs
So (9x+10)/(11x+10) = 7/8
Solve, x = 2
Their ages 4 yrs ago – 18 and 22, so after 4 yrs (Or present age) = 22 and 26
So sum = 22+26

Question 5 of 10

5. Question

1 points

Category: Quantitative Aptitude

50 people start a work working 8 hours each day. After 10 days it was found that only 2/5th of the work was done. How many additional people need to be employed in order to complete the remaining work in 5 days working same number of hours each day?

Correct

Explanation:
Let x people need to be employed to complete remaining work (1 – 2/5) = 3/5
M1*D1*H1*W2 = M2*D2*H2*W1
50*10*8*(3/5) = (50+x)*5*8*(2/5)
Solve x = 100

Incorrect

Explanation:
Let x people need to be employed to complete remaining work (1 – 2/5) = 3/5
M1*D1*H1*W2 = M2*D2*H2*W1
50*10*8*(3/5) = (50+x)*5*8*(2/5)
Solve x = 100

Question 6 of 10

6. Question

1 points

Category: Quantitative Aptitude

There is a loss of 40% on an article when it is sold at 3/4th the previous selling price. What is the actual profit/loss% on it?

There are three pipes A, B and C such that A and B can fill the tank in 20 min. and 30 min. respectively and C can empty it in 24 min. all are opened and after 6 minutes pipe C is closed. In how many minutes the tank will get full?

Correct

Explanation:
Let the tank full in x minutes, then A and B opened for x minutes and C for 6 minutes.
(1/20 + 1/30)*x – (1/24)*6 = 1
(1/12)*x = 5/4
Solve, x = 15

Incorrect

Explanation:
Let the tank full in x minutes, then A and B opened for x minutes and C for 6 minutes.
(1/20 + 1/30)*x – (1/24)*6 = 1
(1/12)*x = 5/4
Solve, x = 15

Question 8 of 10

8. Question

1 points

Category: Quantitative Aptitude

Rs 2210 is lent in two parts, one part at 7% for 4 years and remaining part at 8% for 5 years. After the respective times, the interest received from both parts is same. Find the amount lend at 8%.

Correct

Explanation:
Shortcut: When interests are equal
Parts will be divided in ratio –
1/r1t1 : 1/r2t2
1/7*4 : 1/8*5
1/7 : 1/10 = 10 : 7
At 8% = 7/(10+7) * 2210

Incorrect

Explanation:
Shortcut: When interests are equal
Parts will be divided in ratio –
1/r1t1 : 1/r2t2
1/7*4 : 1/8*5
1/7 : 1/10 = 10 : 7
At 8% = 7/(10+7) * 2210

Question 9 of 10

9. Question

1 points

Category: Quantitative Aptitude

There are 4 men and 6 women. In how many ways a group of 5 people can be made containing at least 3 women?

Correct

Explanation:
Case 1: 3 women
6C3 * 4C2 = 120
Case 2: 4 women
6C4 * 4C1 = 60
Case 3: 5 women
6C5 * 4C0 = 6
Add all cases

Incorrect

Explanation:
Case 1: 3 women
6C3 * 4C2 = 120
Case 2: 4 women
6C4 * 4C1 = 60
Case 3: 5 women
6C5 * 4C0 = 6
Add all cases

Question 10 of 10

10. Question

1 points

Category: Quantitative Aptitude

A man can row 8 km/hr in still water. When the river is running at 4 km/hr, it takes him 4 hrs to row to a place and come back. How far is the place?

Correct

Explanation:
B is speed of boat in still water, R is speed of stream
Time is total time taken for upstream and downstream
Distance = time * [B^2 – R^2] / 2*B
= 4 * [8^2 – 4^2] / 2*8

Incorrect

Explanation:
B is speed of boat in still water, R is speed of stream
Time is total time taken for upstream and downstream
Distance = time * [B^2 – R^2] / 2*B
= 4 * [8^2 – 4^2] / 2*8