# DXC Quantitative Aptitude Questions And Answers

DXC Quantitative Aptitude MCQs : This section focuses on "Quantitative Aptitude" for DXC Exam. These Quantitative Aptitude MCQs are asked in previous DXC placements/recruitment exams and will help you to prepare for upcoming DXC drives.

1. Shyam will complete work in 20 days. If Ram is 25% more efficient than Shyam, then how many days he will take to complete the work?

A. 14

B. 16

C. 18

D. 20

View Answer

Ans : C

Explanation: Work done by Shyam in one day = 1/20

Work done by Ram in one day = (1/20) × (125/100) = 5/80 = 1/16

So, Ram can complete the work in 16 days.

2. Two numbers are in the ratio of 5:11. If their HCF is 7, find the numbers.

A. 35, 77

B. 44, 66

C. 35, 55

D. 54, 44

View Answer

Ans : A

Explanation: Let’s try to understand it more clearly.

Take two numbers say 20 and 36

we can write 20 as 2 x 2 x 5 and 36 as 2 x 2 x 3 x 3.

So ,HCF =2 x 2

and the ratio of the two numbers ie 20 and 36 is 5:9

If we want to get back our numbers from the ratio and HCF.We simply do 5 x hcf and 9 x hcf ie 5 x 4 and 9 x 4. We get our original numbers ie 20 and 36.

Apply the same thing to the given problem.

The ratio is 5:11, HCF=7

So, numbers are 5 x 7 and 11 x 7 ie 35 and 77.

3. When a number is successively divided by 2, 3, 7, we get 1, 2, 3 as the remainder respectively. What is the smallest such number ?

A. 64

B. 65

C. 70

D. 75

View Answer

Ans : B

Explanation: Basically, we successively multiply the divisors with the result of the previous stage and add the corresponding remainder.

7 x 1 + 3 = 10

3 x 10 + 2 = 32

2 x 32 + 1 = 65

Thus, 65 is the required answer.

4. A 2% error in excess is found while measuring the side of a square. So, find the percentage of error in the calculated area of the square.

A. 4.04%

B. 2.30%

C. 1.03%

D. 3%

View Answer

Ans : A

Explanation: Percentage error in the calculated area = (2+ 2+ (2×2/100))% = 4.04%

5. What is value of 945.341-1042.792+875.435+31.025?

A. 810.008

B. 809.009

C. 795.659

D. 809.009

View Answer

Ans : D

Explanation: To make it simpler, first we can manually calculate (addition/ subtractions) values after point, later we can sum up the rest of the values. (0.341+0.435+0.025-0.792=0.009) (945+875+31-1042=809) 809+0.009=809.009

6. A person buys a pen from a wholesaler at Rs. 10 for 20 pens. He sells those pens at Rs. 10 for 15 pens. Find his profit or loss percent.

A. 0.33334

B. 0.23344

C. 0.4234

D. 0.5434

View Answer

Ans : A

Explanation: CP for each pen = 10 / 20 = Rs. 0.50

SP for each pen = 10 / 15 = Rs. 2 / 3

Profit = SP – CP = Rs. (2 / 3) – 0.50 = Rs. 1 / 6

Therefore, profit percent = [ (1/6) / (0.50) ] x 100 = 33.334%

7. Walking at the rate of 4 kmph a man cover certain distance in 2 hr 45 min. Running at a speed of 16.5 kmph the man will cover the same distance in.

A. 20

B. 30

C. 40

D. 60

View Answer

Ans : C

Explanation: Distance = Speed × time

Here time = 2hr 45 min = 11/4 hr

Distance = 4×11/4=11 km

New Speed =16.5 kmph

Therefore time = DS=11/16.5=40 min

8. 25 % of a number is 8 less than one third of that number. Find the number.

A. 98

B. 96

C. 94

D. 100

View Answer

Ans : B

Explanation: 96 is the required number.

9. The Compound Interest on Rs. 30,000 at 7% per annum is Rs. 4347. The period(in years) is :

A. 1

B. 2

C. 3

D. 4

View Answer

Ans : B

Explanation: Let the period be n years

Then amount after n years= Rs.(30000+ 4347)= 34347

P(1+ R/100)^T = 34347

30000(1+ 7/100)^n = 34347

30000(107/100)^n = 34347

(107/100)^n = 34347/30000= 11449/10000= (107/100)^2

n = 2 years

10. Average age of 7 family members is 75 years. But average age of 6 of them is 74 years 6 months. What is the age of the 7th family member?

A. 75

B. 78

C. 79

D. 80

View Answer

Ans : B

Explanation: The average age of 7 family members = 75 years

The no. of family members = 7

The sum of ages of 7 family members = 75 × 7 = 525 years

The average age of 6 family members are,

= 74 years 6 months

= 74 years + 6/12 years [ 1 month = calender year ]

= 74 years + 0.5 years

= 74.5 years

The no. of family members = 6

The sum of ages of 6 of the family members = 74.5 × 6 = 447 years

Now, The age of the 7th family member will be,

= [Sum of ages of 7 members] - [Sum of ages of 6 members]

= 525 years - 447 years

= 78 years

Thus, the age of the 7th family member is 78 years.

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