# CGI Quantitative Aptitude Questions And Answers

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

1. A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?

A. 3.6

B. 7.2

C. 8.4

D. 10

View Answer

Ans : B

Explanation: Speed = 600/ 5 x 60 m/sec. = 2 m/sec. = 2 x 18/5km/hr =7.2 km/hr

2. The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:

A. 0.32

B. 0.34

C. 0.42

D. 0.44

View Answer

Ans : D

Explanation: overall percentage change = X+y+xy⁄100

=> 20+20+400⁄100 = 44%

3. A man buys a toy for Rs. 25 and sells it for Rs. 30. Find his gain/loss percentage.

A. 0.2

B. 0.7

C. 0.8

D. 0.4

View Answer

Ans : A

Explanation: Profit Percentage = 30-25/25 x 100 = 5/25 x 100 = 20%

4. A 180m long train is running at 54 Kmph. how much time will it take to cross a platform of 120m long?

A. 20sec

B. 22sec

C. 19sec

D. 18sec

View Answer

Ans : A

Explanation: D = S × T

180 = 54 Kmph × Time

180= 54×5/18 × Time

Time = 20 Sec

5. Average of all prime numbers between 30 to 50?

A. 37

B. 37.8

C. 39

D. 39.8

View Answer

Ans : D

Explanation: Prime numbers between 30 and 50 are:
31, 37, 41, 43, 47
Average of prime numbers between 30 to 50 will be

((31+37+41+43+47)/5)=199/5=39.8

6. A, B and C take a work at Rs 24000. A alone can do the work in 20 days, B alone can do the same work in 30 days and C alone can do the same work in 24 days. Find the wages of A.

A. Rs 9400

B. Rs 6500

C. Rs 6480

D. Rs 9600

View Answer

Ans : D

Explanation: Let total work = LCM of 20, 30 and 24 =120 Units.

One day work of A = 120/20 =6 units

One day work of B = 120/30 =4 units.

One day work of C = 120/24= 5 units.

Ratio of their work A: B:C =6: 4 : 5

Wages of A = (6/15) * 24000 = 9600

7. The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is:

A. 127

B. 305

C. 235

D. 123

View Answer

Ans : A

Explanation: Required number = H.C.F. of (1657 - 6) and (2037 - 5)

= H.C.F. of 1651 and 2032 = 127.

8. If each side of a square is increased by 25%, find the percentage change in its area.

A. 62.25

B. 59.52

C. 58.75

D. 56.25

View Answer

Ans : D

Explanation: Let each side of the square be a. Then, area = a2.

New side =(125a/100) =(5a/4). New area = (5a/4)2 =(25a2)/16.

Increase in area = ((25 a2)/16)-a2 =(9a2)/16.

Increase% = [((9a2)/16)×(1/a2)×100] % = 56.25%.

9. Raj invested Rs 76000 in a business. After few months Monty joined him and invests Rs 57000. At the end of the year, both of them share the profits at the ratio of 2:1. After how many months Monty joined Raj?

A. 4 Months

B. 7 Months

C. 8 Months

D. 12 Months

View Answer

Ans : A

Explanation: We can simply compute per month investment of both partnership

Raj invested Rs 76,000 for 12 months and Monty invested Rs 57,000 for x months.

Now 76000 × 12 / 57000 × x = 2 :1

=> 76 × 12 / 2 = 57x

=> x = 8

So Monty invested his money for 8 months and he joined after 4 months

10. Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long it will take to fill the tank?

A. 10 mins

B. 12 mins

C. 15 mins

D. 20 mins

View Answer

Ans : B

Explanation: In this type of questions we first get the filling in 1 minute for both pipes then we will add them to get the result, as

Part filled by A in 1 min = 1/20

Part filled by B in 1 min = 1/30

Part filled by (A+B) in 1 min = 1/20 + 1/30= 1/12

So both pipes can fill the tank in 12 mins.

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