RRB-NTPC 2021 Mathematics

Practice subject-wise previous year questions

Question 2251
Arithmetic

What is the primary reason that roughage is included in a balanced human diet?

A
It builds muscles.
B
It aids digestion and prevents constipation.
C
It helps in fat storage.
D
It increases sugar absorption.
Question 2252
Arithmetic

Which material was used to make the famous 'Dancing Girl' statue that belonged to the Indus Valley Civilization?

A
Iron
B
Silver
C
Bronze
D
Copper
Question 2253
Arithmetic

Which of the following urban areas is identified as Million Plus Urban Agglomerations Cities as per Census of India 2001?

A
Chandigarh
B
Kannauj
C
Lucknow
D
Dehradun
Question 2254
Arithmetic

IL 17 is related to LN 12 in a certain way. In the same way, MN 12 is related to PP 7. To which of the given options is VR 4 related, following the same logic?

A
VX -3
B
BX -9
C
YT -1
D
NF -7
Question 2255
Arithmetic

Each of C, D, E, F, S, T and U has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. F has the exam on Thursday. C has the exam on one of the days after S and on one of the days before E. U has the exam on one of the days after T but on one of the days before D. T has the exam on one of the days after F. How many people have their exams between U and C?

A
Four
B
Three
C
One
D
Two
Question 2256
Arithmetic

If ‘P’ stands for ‘÷’, ‘Q’ stands for ‘×’, ‘R’ stands for ‘+’ and ‘S’ stands for ‘−’, then the resultant of which of the following would be 50?

A
24 S 4 Q 28 P 12 R 6
B
24 Q 4 R 28 S 12 P 6
C
24 P 4 S 28 R 12 Q 6
D
24 R 4 P 28 Q 12 S 6
Question 2257
Arithmetic

Which of the following modern physicist closely examined Newtonian mechanics' foundations?

A
James Clerk Maxwell
B
Albert Einstein
C
Galileo Galilei
D
Ernst Mach
Question 2258
Arithmetic

Which of the following statements regarding the Industrial Sector in India is/are correct? 1. According to National Manufacturing Policy 2011, every job created in the manufacturing sector creates two-three additional jobs in related activities. 2. Industries add value to the existing goods and also to the skill of labour employed in it; therefore, this sector is also considered a transformational sector. 3. As industries employ a large part of the population, industrial development is one of the preconditions for the eradication of unemployment and poverty from our country.

A
Only 3
B
1, 2 and 3
C
Only 2 and 3
D
Only 1 and 2
Question 2259
Arithmetic

In a certain code language, 'A + B' means 'A is the sister of B' 'A - B' means 'A is the brother of B' 'A × B' means 'A is the wife of B' 'A ÷ B' means 'A is the father of B'. Based on the above, how is M related to Q if 'M ÷ N + O × P – Q'?

A
Wife's Father
B
Brother's Wife's Brother
C
Wife's Brother
D
Brother's Wife's Father
Question 2260
Arithmetic

In January 2021, National Youth Day was celebrated to mark the birth anniversary of which Indian leader?

A
Subhas Chandra Bose
B
Rabindranath Tagore
C
Swami Vivekananda
D
Raja Rammohan Roy
Question 2261
Arithmetic

A tap fills a cistern in 18 hours. Another tap empties the full tank in 24 hours. How long (in hours) will it take to fill three-fourth of the tank, if the tank is empty initially and both the taps are open together?

A
108
B
162
C
54
D
216
Question 2262
Arithmetic

If the sum of three numbers a, b and c is 5, the sum of the product of two numbers at a time is -2 and the product of the numbers a, b and c is 3. Find the value of $a^3 + b^3 + c^3$.

A
164
B
148
C
159
D
126
Question 2263
Arithmetic

What should come in place of the question mark (?) in the given series? 942 940 936 930 922 ?

A
910
B
908
C
912
D
906
Question 2264
Arithmetic

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? BI16, EL24, HO32, KR40, ?

A
NV48
B
NU48
C
NU47
D
NV47
Question 2265
Arithmetic

A boat travels 14 km upstream in 14 hours and 171 km downstream in 9 hours. What is the speed of the boat in still water?

A
18 km/hr
B
6 km/hr
C
17 km/hr
D
10 km/hr
Question 2266
Arithmetic

Which of the following changes was introduced in 2024 under the Companies Act amendments to enhance corporate social responsibility (CSR) transparency in India?

A
Mandatory quarterly CSR reporting accompanied by independent audits
B
Exemption of companies with a turnover below ₹500 crore from CSR obligations
C
Requirement for at least 50% of board members to be CSR specialists
D
Reduction in the minimum CSR spending threshold for all eligible companies
Question 2267
Arithmetic

Which of the following options best describes the principle of 'collective executive responsibility' as applicable to the Council of Ministers in India?

A
Ministers can opt out of collective responsibility if they disagree publicly.
B
Only the Prime Minister is responsible for decision-making.
C
All ministers share full responsibility for government decisions.
D
Each minister is independent and is solely accountable for his/her actions.
Question 2268
Arithmetic

In February 2021, five cheetahs were released into which national park of India?

A
Kuno National Park
B
Periyar Wildlife Sanctuary
C
Gir National Park
D
Kanha National Park
Question 2269
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 is the letter-cluster pair that 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
PI - KJ
B
KO - LP
C
QU - RV
D
NR - OS
Question 2270
Arithmetic

The Nizam of Hyderabad tried to project his rule as:

A
a British protectorate
B
a Hindu monarchy
C
a Muslim sovereignty in Deccan
D
a secular republic
Question 2271
Arithmetic

In March 2021, which anniversary of National Defence Day was observed to honour the sacrifices of India's armed forces?

A
76th Anniversary
B
60th Anniversary
C
87th Anniversary
D
65th Anniversary
Question 2272
Arithmetic

If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 3518642, then what will the sum of the digits that are second from the left and second from the right in the new number thus formed be?

A
8
B
9
C
7
D
6
Question 2273
Arithmetic

A cistern has a hole in the bottom through which the water is leaking. A tap can fill the cistern in 8 hours and the hole in the bottom can empty the fully filled cistern in 10 hours. If both the tap and the hole are open, then what will be the time taken to completely fill the empty cistern?

A
21.5 hours
B
34 hours
C
40 hours
D
48.5 hours
Question 2274
Arithmetic

In a certain code language, 'OWNS' is coded as '5391' and 'SIDE' is coded as '2458'. What is the code for 'S' in the given code language?

A
1
B
5
C
4
D
2
Question 2275
Arithmetic

What is another name for the Great Himalayan range?

A
Shiwalik Range
B
Inner Himalayas
C
Central Axial Range
D
Northeastern Hills