RRB-NTPC 2016 Mathematics

Practice subject-wise previous year questions

Question 426

Arithmetic

The median of the given distribution is 28.5. Find the missing frequency x.   Class 0-10 10-20 20-30 30-40 40-50 50-60 Frequency  5 x 20 15 7 5

A

10

B

8

C

3

D

5

Question 427

Arithmetic

The cost of five tables and seven chairs is ₹7040. If a table costs ₹400 more than a chair, find the cost of a table.

A

₹420

B

₹820

C

₹700

D

₹800

Question 428

Arithmetic

If 40% of a number exceeds 25% of it by 42, then the number is:

A

300

B

280

C

260

D

320

Question 429

Arithmetic

A and B can do a piece of work in 12 days and 30 days, respectively. Both work for 4 days and then A leaves. How long (in days) will B take to complete the remaining work?

A

15

B

18

C

17

D

16

Question 430

Arithmetic

The largest four-digit number which when divided by 11, 7 and 14 leaves the remainder 2 in each case, is:

A

9972

B

9435

C

9858

D

9901

Question 431

Arithmetic

Evaluate \(23^3 + (-19)^3 + (-4)^3\) .

A

4958

B

5089

C

5244

D

4998

Question 432

Arithmetic

Venu invested a certain sum of money at 10% per annum. After 2 years, he received ₹136.50 as compound interest, compounded annually. Find the corresponding simple interest (in ₹) for 2 years at the same rate.

A

115

B

125

C

130

D

120

Question 433

Arithmetic

Patna Express leaves Delhi at 10:00 AM and reaches Patna at 7:00 PM the same day. Delhi Express leaves Patna at 2:00 PM and reaches Delhi at 1:00 AM on the next day. Both trains travel on the same route in opposite directions. At what time do they meet?

A

04:45 PM

B

04:30 PM

C

03:45 PM

D

04:15 PM

Question 434

Arithmetic

A trader marks his goods such that even after allowing a discount of 25%, he makes a profit of 10%. If he gives only 10% discount, then find the profit percentage.

A

28%

B

30%

C

35%

D

32%

Question 435

Arithmetic

Ramu is 8 years older than Keeran. Seven years ago, Ramu's age was three times Keeran's age. Find the present age of Ramu.

A

25 years

B

23 years

C

19 years

D

16 years

Question 436

Arithmetic

A retailer has fixed the price of an article at 20% above the cost price. If he offers a discount of ₹2 for a purchase of ₹30, what is his gain or loss percentage?

A

16% gain

B

11% loss

C

14% gain

D

12% gain

Question 437

Arithmetic

The difference in simple interest on a sum of money invested at 4% per annum for five years and for three years is ₹784. Find the simple interest (in ₹) on the same sum invested at the same rate of interest for eight years.

A

3136

B

2352

C

3920

D

4144

Question 438

Arithmetic

ABCD is a quadrilateral in which AB || DC, and E and F are the mid points of the diagonals AC and BD, respectively. If AB = 60 cm, BC = 65 cm, DC = 18 cm, and AD = 10 cm, then what is the length (in cm) of EF?

A

23

B

21

C

25

D

22

Question 439

Arithmetic

A, B, and C can complete a work in 10, 12, and 15 days, respectively. A and B work together for 3 days, after which A withdraws. B and C then work together. Find the number of days required by B and C to complete the remaining work.

A

5 days

B

3 days

C

4 days

D

6 days

Question 440

Arithmetic

A train passes two persons walking in the same direction in which the train is going. These persons are walking at the rates of 2 km/hr and 4 km/hr, respectively, and are completely crossed by the train in 9 seconds and 10 seconds, respectively. What is the length of the train?

A

75 meters

B

50 meters

C

45 meters

D

55 meters

Question 441

Arithmetic

The sum of two positive numbers is 67 and their product is 1012. The positive difference between them is:

A

21

B

30

C

13

D

24

Question 442

Arithmetic

In a class, there are 10 boys more than girls. Each girl has 3 pencils and each boy has 2 pencils with them. The total number of pencils in the class is 170. The ratio of girls to boys in the class is _____.

A

\(5:6\)

B

\(2:3\)

C

\(3:4\)

D

\(4:5\)

Question 443

Arithmetic

A and B can do a piece of work in 12 days and 15 days, respectively. Both work for 4 days and then A leaves. How long (in days) will B take to complete the remaining work?

A

8

B

6

C

7

D

5

Question 444

Arithmetic

Which of the following numbers is divisible by 11?

A

5281

B

4735

C

2145

D

3522

Question 445

Arithmetic

Let both \(a\) and \(b\) be prime numbers such that \((a^2 + b)\) is also a prime number less than 20. What is the number of possible values of \(b\) ?

A

6

B

3

C

5

D

4

Question 446

Arithmetic

What is the mode of the following data? 40, 47, 54, 45, 50, 43, 53, 52, 53, 49, 40, 50, 42, 52, 44, 52, 47, 55

A

40

B

52

C

47

D

54

Question 447

Arithmetic

What is the greatest length of a measuring rod that can exactly measure three fabric pieces of lengths 7 m 35 cm, 9 m 45 cm, and 10 m 50 cm?

A

1 m 25 cm

B

1 m 15 cm

C

1 m 5 cm

D

1 m 35 cm

Question 448

Arithmetic

If p is the third proportional to 6 and 18, and q is the third proportional to p and 54, find the value of q.

A

36

B

72

C

18

D

54

Question 449

Arithmetic

The marked price of a refrigerator is ₹4,884. The shopkeeper allows a discount of 10% and gains 8%. If no discount is allowed, his gain percentage would be:

A

20%

B

40%

C

30%

D

10%

Question 450

Arithmetic

A student scores an average of 72 marks in 5 subjects and 84 marks in 3 additional subjects. The overall average marks is

A

75.25

B

76.25

C

76.5

D

75.5

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