RRB-NTPC 2021 Mathematics

Practice subject-wise previous year questions

Question 2551
Arithmetic

Find the smallest number by which 6760 must be multiplied to make it a perfect square.

A
28
B
26
C
23
D
10
Question 2552
Arithmetic

What will be the difference in population 3 years ago and 2 years ago of a town whose current population of 2,50,000 is increasing at a rate of 25% every year?

A
31,450
B
31,250
C
32,350
D
32,000
Question 2553
Arithmetic

Find the smallest number by which 6627 must be multiplied to make it a perfect square.

A
4
B
11
C
7
D
3
Question 2554
Arithmetic

Who administers the oath of office and secrecy to the Union Ministers under Article 75(4) of the Constitution of India?

A
President of India
B
Prime Minister
C
Vice President
D
Chief Justice of India
Question 2555
Arithmetic

Two banks, A and B, offered loans at 3.5% and 6% per annum, respectively. Atul borrowed an amount of ₹5,00,000 from each bank. Find the positive difference between the amounts of simple interest paid to the two banks by Atul after 4 years.

A
50,000
B
51,000
C
51,500
D
49,500
Question 2556
Arithmetic

In which year was the Pradhan Mantri Awas Yojana (PMAY), a flagship mission aimed at addressing the urban housing shortage in India, launched?

A
2018
B
2022
C
2014
D
2015
Question 2557
Arithmetic

If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 7125843, then what will be the sum of the highest and lowest digits in the new number thus formed be?

A
6
B
7
C
9
D
8
Question 2558
Arithmetic

Which of the following numbers is divisible by 64?

A
5129
B
4797
C
5760
D
5327
Question 2559
Arithmetic

Harry ranked 34th from the top and 25th from the bottom in his class. How many students are there in his class?

A
56
B
59
C
58
D
57
Question 2560
Arithmetic

A shopkeeper buys 20 pens at ₹15 each and another 30 pens at ₹10 each. He mixes all the pens and sells them at ₹14 each. What is the profit or loss per pen he makes on an average?

A
₹0.50 loss
B
₹1 profit
C
₹0.20 loss
D
₹2 profit
Question 2561
Arithmetic

Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only. (NOTE: All numbers are single digit numbers only.) (Left) 3 £ & 1 2 © 2 5 $ 9 3 © 9 4 3 % 9 3 # © 6 2 (Right) How many such symbols are there each of which is immediately preceded by a number and also immediately followed by a symbol?

A
2
B
4
C
3
D
1
Question 2562
Arithmetic

Which of the following is the greatest number that divides 104 and 133 and leaves 8 and 5 as respective remainders?

A
42
B
32
C
41
D
40
Question 2563
Arithmetic

Which city hosted the International Cooperative Alliance (ICA) Global Cooperative Conference and General Assembly in November 2024?

A
Bengaluru
B
Hyderabad
C
New Delhi
D
Mumbai
Question 2564
Arithmetic

The mode of the observations 3, 6, 5, 7, 8, 4, 3, 3, 2, 5, 3, 6, 4, 8 and 5 is:

A
7
B
5
C
6
D
3
Question 2565
Arithmetic

The shorter side of a rectangle is 18 cm less than the longer side. The numerical value of its area is equal to 6 times the numerical value of its perimeter. What is the length (in cm) of its longer side?

A
23
B
21
C
33
D
36
Question 2566
Arithmetic

Find the effective price percentage of the marked price after three consecutive discounts of 8%, 16% and 3%. (Rounded up to two decimal places.)

A
73.29%
B
74.96%
C
72.61%
D
74.13%
Question 2567
Arithmetic

What should come in place of the question mark (?) in the given series? 5 8 17 44 125 ?

A
370
B
360
C
358
D
368
Question 2568
Arithmetic

In a certain code language, 'DISH' is coded as '4268' and 'HUNT' is coded as '3527'. What is the code for 'H' in the given code language?

A
2
B
7
C
6
D
3
Question 2569
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 :: ? #: WQM :: TNJ : %

A
# = ZTP, % = QKG
B
# = KUY, % = QKJ
C
# = MKP, % = QPI
D
# = JTP, % = MWR
Question 2570
Arithmetic

Which of the following methods is used to create a new folder in Windows 11 OS from Desktop?

A
Drag a file to Desktop
B
Press Alt + F4
C
Press Ctrl + N
D
Right-click → Select New → Folder
Question 2571
Arithmetic

What is the primary benefit of having local self-government institutions like Panchayats in India?

A
They solely focus on revenue collection.
B
They replace the entire administrative framework of the State.
C
They provide direct access to national policy-making.
D
They are closest to the people and understand local problems.
Question 2572
Arithmetic

$\triangle$ ABC is similar to $\triangle$ PQR, QR = 8 cm, BC = 4 cm and perimeter of $\triangle$ PQR = 32 cm. Find the perimeter of $\triangle$ ABC.

A
64 cm
B
48 cm
C
16 cm
D
24 cm
Question 2573
Arithmetic

Which provision was introduced in the Constitution of India through the 74th Amendment Act?

A
Part X
B
Part IX-A
C
Part IX
D
Part XI
Question 2574
Arithmetic

Which of the following classical dance forms was performed by 'Maharis' as part of temple service?

A
Kathakali
B
Kathak
C
Kuchipudi
D
Odissi
Question 2575
Arithmetic

A man spends 76% of his monthly salary on the rent of his house. If every month he also spends ₹627 on his conveyance and ₹3,947 on his grocery and saves the remaining ₹712, his monthly salary is:

A
₹22,111
B
₹22,025
C
₹22,119
D
₹22,023