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Question 1 of 10

1. Question

1 points

Category: Quantitative Aptitude

The average age of Sagar and Ganesh is 20 years. If Karthik replaces Sagar, the average age becomes 19 years and if Karthik replaces Ganesh, then the average age becomes 21 years. If the average age of Deepak and Chandu be half of the average age of Sagar, Ganesh, and Karthik ,then the average age of all the five people is?

The difference between average of first ‘n’ natural numbers and the average of squares of same ‘n’ natural numbers is 96 then what is the value of ‘n’?

If a sum of Rs. X is lent at 10% for 2 years it fetched Rs. 420 as interest then what is the value of X?

Correct

Answer :5.Rs. 2000
Solution:
x+420 = x(1+10/100)^2
x =2000

Incorrect

Answer :5.Rs. 2000
Solution:
x+420 = x(1+10/100)^2
x =2000

Question 4 of 10

4. Question

1 points

Category: Quantitative Aptitude

The total surface area of the cylinder is 10560 m^2 and the sum of height and radius of base of cylinder is 60 m. What is the ratio of height and radius of the cylinder?

In an office there are 40% female employees. 50% of all the male employees are computer literate. If there are total 62% employees computer literate out of the total 5200 employees, then the no. of female employees who are computer literate?

Correct

Answer : 1. 1664
Solution:
total employees = 5200
Number of computer literates = 3224
Male computer literates = 5200*60/100*50/100 = 1560
Female computer literates = 3224-1560 = 1664

Incorrect

Answer : 1. 1664
Solution:
total employees = 5200
Number of computer literates = 3224
Male computer literates = 5200*60/100*50/100 = 1560
Female computer literates = 3224-1560 = 1664

Question 6 of 10

6. Question

1 points

Category: Quantitative Aptitude

The ratio of present ages of A,B and C is 5:3:8. After five years the ratio of their ages is 6:4:9. Then what is the ratio of their before years?

Correct

Answer : 2. 4:2:7
Solution:
A = 5x B = 3x C =8x
After five years A = 5x+5 B =3x+5 C =8x+5
ratio is 6:4:9
then their ages are 25, 15 and 40
ages before 5 years 20, 10, 35

Incorrect

Answer : 2. 4:2:7
Solution:
A = 5x B = 3x C =8x
After five years A = 5x+5 B =3x+5 C =8x+5
ratio is 6:4:9
then their ages are 25, 15 and 40
ages before 5 years 20, 10, 35

Question 7 of 10

7. Question

1 points

Category: Quantitative Aptitude

The percentage profits on three articles X, Y, and Z is 20%, 10% and 25% and the ratio of their cost price is 1:3:4. Also, the ratio of the number of articles sold of X, Y and Z is 5:1:3. The overall profit percentage is?

Correct

Answer : 5. 21.5%
Solution:
CP be x, 3x, 4x
Items sold be 5y, y, 3y
Total cost = 5xy+3xy+12xy = 20xy
profit of X = xy
Profit of Y = 0.3xy
Profit of Z = 3xy
total profit = 4.3xy
% = 4.3/20*100 = 17%

Incorrect

Answer : 5. 21.5%
Solution:
CP be x, 3x, 4x
Items sold be 5y, y, 3y
Total cost = 5xy+3xy+12xy = 20xy
profit of X = xy
Profit of Y = 0.3xy
Profit of Z = 3xy
total profit = 4.3xy
% = 4.3/20*100 = 17%

Question 8 of 10

8. Question

1 points

Category: Quantitative Aptitude

A man can row 20 km/h in still water and he finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of current (in km/h)?

Correct

Answer : 3. 10
Solution:
1/20-R = 3/20+R
R =10

Incorrect

Answer : 3. 10
Solution:
1/20-R = 3/20+R
R =10

Question 9 of 10

9. Question

1 points

Category: Quantitative Aptitude

A train of length 360 meters takes 20 seconds to pass over another train 140 meters long coming from the opposite direction. If the speed of the first train be 30 kmph, the speed of the second train is?

Correct

Answer : 5. None
Solution:
x+30 = (360+140)/20*18/5
x =60

Incorrect

Answer : 5. None
Solution:
x+30 = (360+140)/20*18/5
x =60

Question 10 of 10

10. Question

1 points

Category: Quantitative Aptitude

Vinay can do a piece of work in 48 days. He started the work and left after some days, when 25% work was done. After it Rahul joined and completed it working for 72 days. In how many days Vinay and Rahul can do the complete work, working together?

Correct

Answer : 2. 16 Days
Solution:
¾ work 72 days
total work 96 days
1/48+1/96 = 1/32 =32 days

Incorrect

Answer : 2. 16 Days
Solution:
¾ work 72 days
total work 96 days
1/48+1/96 = 1/32 =32 days

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