RRB-NTPC 2021 Mathematics

Practice subject-wise previous year questions

Question 2401
Arithmetic

Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ? #: LIN :: DAF : %

A
# = PBG, % = DER
B
# = OLQ, % = AXC
C
# = PLQ, % = MHU
D
# = POQ, % = ALK
Question 2402
Arithmetic

Find a single discount (rounded up to two decimal places) equal to three consecutive discounts of 13%, 20% and 4%.

A
36.92%
B
33.67%
C
33.18%
D
31.96%
Question 2403
Arithmetic

A, B, C, D, R, S and T are sitting around a circular table facing the centre of the table. B sits third to the left of T. R sits second to the left of S. Only T sits between A and R. C is not an immediate neighbour of B. How many people sit between D and R when counted from the right of D?

A
Three
B
Four
C
One
D
Two
Question 2404
Arithmetic

In 2024, the Government of India replaced the Indian Telegraph Act, 1885 by enacting a new law to modernise the telecom sector. What is the name of this new legislation?

A
Digital Communication Reform Act, 2024
B
The Telecommunication Act, 2023
C
Information Infrastructure Modernization Act, 2024
D
Bharat Telecom Services Act, 2023
Question 2405
Arithmetic

Two taps can fill a cistern in 4 hours and 32 hours, respectively. A third tap can empty it in 4 hours. How long (in hours) will it take to fill one-fourth of the empty cistern, if all of them are opened together?

A
16
B
32
C
8
D
24
Question 2406
Arithmetic

If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 6753412, what will be the sum of the digits which are second from the left and second from the right in the new number thus formed?

A
11
B
10
C
9
D
8
Question 2407
Arithmetic

Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

A
BU - GK
B
YR - DH
C
TN - YC
D
MF - RV
Question 2408
Arithmetic

If ‘+’ means ‘subtraction’, ‘−’ means ‘multiplication’, ‘×’ means ‘division’ and ‘÷’ means ‘addition’, then what will come in place of the question mark (?) in the following equation?  96 × 6 − 8 ÷ 71 + 26 = ?

A
181
B
194
C
173
D
186
Question 2409
Arithmetic

The Digital India initiative, launched in 2015, marked a significant step in India's post-reform development trajectory. Which of the following is NOT a pillar of the Digital India initiative?

A
Governance and Services on Demand
B
Privatisation of Internet Services
C
Digital Infrastructure as a Utility to Every Citizen
D
Digital Empowerment of Citizens
Question 2410
Arithmetic

Which Constitutional provision directs the State to ensure that justice is not denied to any citizen due to economic or other disabilities?

A
Article 32
B
Article 39A
C
Article 21
D
Article 14
Question 2411
Arithmetic

In a certain code language, 'BEST' is coded as '4568' and 'STAB' is coded as '8965'. What is the code for 'A' in the given code language?

A
6
B
5
C
9
D
8
Question 2412
Arithmetic

What will come in place of the question mark (?) in the following equation, if '+' and '-' are interchanged, and 'x' and '÷' are interchanged? $34 + 43 - 17 \div 121 \times 11 = ?$

A
181
B
164
C
156
D
178
Question 2413
Arithmetic

In which year did the Government of India introduce Securities Transaction Tax (STT) to reduce the complexities involved in the taxation of securities transactions, promote fair trading, and prevent market manipulation?

A
2010
B
2000
C
2004
D
2015
Question 2414
Arithmetic

Considering the fundamental operations of a computer, what is the immediate effect of pressing the Tab key within a command-line interface (CLI) or terminal?

A
It executes the currently typed command.
B
It switches to a different virtual terminal or console.
C
It attempts to auto-complete the currently typed command or filename.
D
It deletes the last typed character.
Question 2415
Arithmetic

A train P going at the speed of 58 km/hr completely passes train Q of length 238 m, going in the same direction on parallel tracks, at 27 km/hr, in 7.5 minutes. How much time (in seconds) will P take to cross completely train R of length 123 m, going at 38 km/hr in the opposite direction?

A
161
B
132
C
141
D
134
Question 2416
Arithmetic

Which of the following statements about the National Mission on Natural Farming (NMNF), launched in 2024, is/are correct? NMNF aims to reach 1 crore farmers and cover 7.5 lakh ha. Model Demonstration Farms will be set up only at Agricultural Universities. Natural Farming practices aim to reduce dependency on externally purchased inputs. It is a Central Sector Scheme under the Ministry of Agriculture and Farmers' Welfare.

A
Only 2 and 3
B
Only 1
C
1, 2, 3 and 4
D
Only 1 and 3
Question 2417
Arithmetic

What was the breakdown of India's medals in the Special Olympics World Winter Games 2021?

A
10 gold, 15 silver, 8 bronze
B
15 gold, 10 silver, 8 bronze
C
8 gold, 18 silver, 7 bronze
D
12 gold, 10 silver, 11 bronze
Question 2418
Arithmetic

Which of the following tribal uprising leaders was/were NOT executed during the revolt but deported to another country?

A
Tilka Manjhi
B
Nilamber and Pitamber
C
Tirot Sing
D
Sidhu and Kanhu Murmu
Question 2419
Arithmetic

Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ? #: MRN :: HMI : %

A
# = PUQ, % = EJF
B
# = KLJ, % = KHI
C
# = LPR, % = JHG
D
# = JIQ, % = FDJ
Question 2420
Arithmetic

Select the triad that follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern. GB-IE-LN KF-MI-PR

A
OJ-QM-TV
B
PJ-QM-TU
C
OJ-QM-TU
D
PJ-QN-TU
Question 2421
Arithmetic

A shop earns ₹500, ₹600, ₹450, ₹550, and ₹400 over five days. What is the average earning per day?

A
₹500
B
₹480
C
₹520
D
₹460
Question 2422
Arithmetic

Two numbers are respectively 47% and 25% more than a third number. The ratio of the two numbers is:

A
161:137
B
155:132
C
149:124
D
147:125
Question 2423
Arithmetic

Barun starts from Point A and drives 8 km towards West. He then takes a left turn, drives 9 km, turns left and drives 12 km. He then takes a left turn and drives 13 km. He takes a final left turn, drives 4 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again? (All turns are 90° turns only, unless specified.)

A
3 km to the south
B
5 km to the south
C
4 km to the south
D
2 km to the south
Question 2424
Arithmetic

Karuna, Jyoti, Shiv, Ram, Puran, Om and Luv are sitting around a circular table, facing the centre. Shiv sits third to the left of Luv. Karuna sits second to the left of Shiv. Jyoti sits third to the right of Puran. Ram sits second to the right of Jyoti. Ram is not an immediate neighbour of Shiv. Who sits to the immediate left of Ram?

A
Luv
B
Karuna
C
Om
D
Puran
Question 2425
Arithmetic

Two sets of numbers are given below. In each set of numbers, certain mathematical operation(s) on the first number results in the second number. Similarly, certain mathematical operation(s) on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the given sets? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 - Operations on 13 such as adding / subtracting / multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) 13 - 26 - 30 - 60; 5 - 10 - 14 - 28

A
3 - 6 - 10 - 30
B
7 - 14 - 18 - 22
C
10 - 20 - 24 - 48
D
2 - 4 - 8 - 12