# (Papers) RRB Group D : Exam Paper & Answer Key Date: 01 Dec 2018 Shift-1 (Mathematics)

## (Papers) RRB Group D : Exam Paper & Answer Key

Date: 01 Dec 2018 Shift-1 (Mathematics)

## Q1. In a hostel of 50 girls there are food provisions for 40 days. If 30 more girls join the hostel, the food provisions will last for:

a. 35 days

b. 30 days

c. 25 days

d. 20 days

## Q2. A man bought article and sold it at a gain of 10% . If he had bought it at 20% less and sold it for Rs.10 more, he would have made a profit of 40%. The cost price of the article is:

a. 500

b. 480

c. 450

d. 400

## Q3. At what rate percent per annum compound interest, will Rs. 10,000 amount to Rs.13,310 in three years ?

a. 8%

b. 10%

c. 12%

d. 15%

## Q4. What is the least number which must be added to 306452 to make it a perfect square ?

a. 460

b. 462

c. 464

d. 466

## Q5. A nursery has 5000 plants. 5% of the plants are roses and 1% is marigold. What is the total number of other plants ?

a. 4750

b. 4700

c. 4250

d. 4200

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## Q6. If 15 boys earn Rs.900 in 5 days, how much will 20 boys earn in 7 days ?

a. Rs. 1980

b. Rs. 1820

c. Rs. 1780

d. Rs. 1680

## Q7. A fisherman can row 2 km against the stream in 20 minutes and return jn 15 minutes. The speed of current is ?

a. 1 km/hr

b. 2 km/hr

c. 3 km/hr

d. None of the above

## Q8. A number whose double is 45 greater than its half is :

a. 50

b. 45

c. 40

d. 30

## Q9. What is the volume of a cube whose surface area is 150 m^{2} (metre
square) ?

a. 1125 cubic metres

b. 225 cubic mt!tres

c. 125 cubic metres

d. None of the above

## Q10. 0.0169 ÷ 0.013 = ?

a. 0.13

b. 0.013

c. 1.3

d. 13

## Q11. In a 500m race the ratio of the speeds of A and B is 3 : 4. A has a start of 140 m. A wins by:

a. 10m

b. 20m

c. 30m

d. None of the above

## Q12. At what price should Shyam sell a pair of shoes which costs him Rs. 1200 so as to gain 72% after allowing a discount or 16%.

a. Rs. 1344

b. Rs. 1434

c. Rs. 1500

d. Rs. 1600

## Q13. The greatest number of three digits which is a perfect square is:

a. 981

b. 971

c. 964

d. 961

## Q14. A train 270m long is moving at a speed of 25kmph. It will cross a man coming from the opposite direction at a speed of 2kmph in :

a. 24 sec

b. 30 sec

c. 36 sec

d. None of the above

## Q15. A swimming pool is 20m long 15m wide and 3m deep. What will be the cost of repairing the floor and wall of the pool at the rate of Rs.25 per square metre ?

a. Rs. 17,250

b. Rs. 15,720

c. Rs . 12,750

d. None of the above

## Q16. A number consists of two digits whose sum Is 9. If 27 are subtracted from the number, its digits are reversed. The number is :

a. 72

b. 63

c. 45

d. None of the above

## Q17. Ram requires 40% to pass, If he gets 185 marks, he fails by 15 marks. What were the maximum marks in the exam?

a. 400

b. 450

c. 500

d. 800

## Q18. 1m = .........nm

a. 106

b. 107

c. 108

d. 109

## Q19. Mr. X runs a marathon starting from the point A he runs 5 km towards north and reach point B, then turns right runs 6 km reach point C, then turn light runs 8 km and reach point D, then turns right runs 10 km and reach point E, then turns right runs 6 km and reach point F, then turns right runs 1 km and reach point G, then turn rights runs 3 km and reach point H. The shortest distance between point D and G is?

a. 2√13

b. √13

c. 3√13

d. 13

## Q20. Rs. 1,080 invested for 3 months gave an interest of Rs. 27. The simple rate of interest per annum was :

a. 2.5%

b. 5%

c. 7.5%

d. 10%

## Q21. Which of the following numbers will have an even number of factors?

a. 16900

b. 52900

c. 30000

d. 36100

## Q22. The square root of 7569 is:

a. 87

b. 93

c. 83

d. 77

## Q23. Sindhu can cover a distance of 62/3 km in 31/4 hours on foot. How many km per hour does she walk?

a. 4 km

b. 2/3 km

c. 8/3 km

d. 11/3 km

## Q24. Jayant covers a certain distance in 5/2 hours at a speed of 54 km/h . How much time will Prabhu take to cover the same distance at a speed of 72 km/h ?

a. 5/2 hours

b. 3 hours

c. 11/5 hours

d. 15/8 hours

## Q25. The ratio of two numbers is 5 : 6 and their LCM is 150. Find the sum of the two numbers.

a. 50

b. 60

c. 54

d. 55

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## ANSWER:

1. (c) 2. (a) 3. (b) 4. (c) 5. (b) 6. (d) 7. (a) 8. (d) 9.
(c) 10. (c)

11. (b) 12. (d) 13. (d) 14. (c) 15. (c) 16. (b) 17. (c) 18. (d) 19. (c)

20. (d) 21. (c) 22. (a) 23. (c) 24. (d) 25. (d)