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
28B
26C
23D
10Question 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
31,450B
31,250C
32,350D
32,000Question 2553
Arithmetic
Find the smallest number by which 6627 must be multiplied to make it a perfect square.
A
4B
11C
7D
3Question 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 IndiaB
Prime MinisterC
Vice PresidentD
Chief Justice of IndiaQuestion 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
50,000B
51,000C
51,500D
49,500Question 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
2018B
2022C
2014D
2015Question 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
6B
7C
9D
8Question 2558
Arithmetic
Which of the following numbers is divisible by 64?
A
5129B
4797C
5760D
5327Question 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
56B
59C
58D
57Question 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 lossB
₹1 profitC
₹0.20 lossD
₹2 profitQuestion 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
2B
4C
3D
1Question 2562
Arithmetic
Which of the following is the greatest number that divides 104 and 133 and leaves 8 and 5 as respective remainders?
A
42B
32C
41D
40Question 2563
Arithmetic
Which city hosted the International Cooperative Alliance (ICA) Global Cooperative Conference and General Assembly in November 2024?
A
BengaluruB
HyderabadC
New DelhiD
MumbaiQuestion 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
7B
5C
6D
3Question 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
23B
21C
33D
36Question 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
370B
360C
358D
368Question 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
2B
7C
6D
3Question 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, % = QKGB
# = KUY, % = QKJC
# = MKP, % = QPID
# = JTP, % = MWRQuestion 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 DesktopB
Press Alt + F4C
Press Ctrl + ND
Right-click → Select New → FolderQuestion 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 cmB
48 cmC
16 cmD
24 cmQuestion 2573
Arithmetic
Which provision was introduced in the Constitution of India through the 74th Amendment Act?
A
Part XB
Part IX-AC
Part IXD
Part XIQuestion 2574
Arithmetic
Which of the following classical dance forms was performed by 'Maharis' as part of temple service?
A
KathakaliB
KathakC
KuchipudiD
OdissiQuestion 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
₹22,111B
₹22,025C
₹22,119D
₹22,023