RRB-NTPC 2021 Mathematics
Practice subject-wise previous year questions
Question 2626
Arithmetic
A group of numbers and symbols is coded using letter codes as per the codes given below and the conditions that follow. Study the given codes and conditions and answer the question that follows. Note: If none of the conditions apply, then codes for the respective number/symbol are to be followed directly as given in the table. Number/Symbol 3 # 4 $ 7 & 6 * 8 ^ 2 Code H A J B K C L D M E N Conditions: i) If the first element is a symbol and the last a number, the codes for these two (the first and the last elements) are to be interchanged. ii) If the first element is an odd number and the last an even number, the first and last elements are to be coded as @. iii) If both the second and third elements are perfect cubes, the code of the second element will be the code of third element. What will be the code for the following group? 3$72
A
NBKHB
©BK©C
HBKND
HKB©Question 2627
Arithmetic
Seven boxes, A, B, C, D, E, F and G, are kept one over the other, but not necessarily in the same order. No box is kept above F. Only three boxes are kept between F and B. Only one box is kept between A and E. E is kept immediately above B. Only four boxes are kept between A and C. G is kept at some place above D. How many boxes are kept above B?
A
2B
4C
3D
1Question 2628
Arithmetic
Which of the following changes did the Waqf (Amendment) Act, 2021 make?
A
Added Muslim women to boardsB
Allowed private leasingC
Removed auditsD
Abolished State Waqf boardsQuestion 2629
Arithmetic
What was the main purpose of the citadel in Harappan cities?
A
To organise religious ceremoniesB
To function as a residential areaC
To function as a marketplaceD
To organise administrative and public functionsQuestion 2630
Arithmetic
Find the simple interest (in ₹) on ₹2,000 at 6% per annum rate of interest for the period from 3 February 2023 to 17 April 2023.
A
25B
24C
23D
22Question 2631
Arithmetic
Ishan starts from Point Y and drives 21 km towards the north. He then takes a left turn, drives 42 km, turns left and drives 41 km. He then takes a right turn and drives 17 km. He takes a right turn, drives 59 km. He then turns right, drives 18 km, turns right and drives 39 km to stop at Point Z. How far (shortest distance) and towards which direction should he drive in order to reach Point Y again? (All turns are 90-degree turns only unless specified.)
A
39 km towards the eastB
43 km towards the westC
45 km towards the southD
41 km towards the eastQuestion 2632
Arithmetic
What should come in place of the question mark (?) in the given series? 713 715 720 722 727 729 ?
A
739B
734C
731D
736Question 2633
Arithmetic
In some cases, the Prime Minister of India assigns an independent charge of a portfolio to a Minister of State. This implies that the Minister of State:
A
is demoted in responsibilitiesB
loses the title of Minister of StateC
functions as if in Cabinet rank with full independent responsibility for that portfolioD
serves jointly with a Cabinet Minister to share and perform responsibilities of the assigned portfolioQuestion 2634
Arithmetic
What is the proper way to print a spreadsheet in MS Excel?
A
Click on the 'Home' tab and select 'Print'B
Press Ctrl + PtC
Click on the 'File' tab and choose 'Print'D
Press Ctrl + SQuestion 2635
Arithmetic
Each of P, Q, R, S, T, U and V has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. Q has the exam on Monday. P has the exam before R. Only two people have exams between U and Q. V has the exam immediately before U but after S. R has the exam before T. How many people have exams between P and S?
A
TwoB
ThreeC
FiveD
FourQuestion 2636
Arithmetic
Which of the following reformers was NOT associated with British India?
A
Bal Gangadhar TilakB
Swami VivekanandaC
AryabhattaD
Raja Ram Mohan RoyQuestion 2637
Arithmetic
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. ETQ IQO MNM QKK ?
A
UHIB
UHJC
UIID
UJJQuestion 2638
Arithmetic
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? FKN17 GLO28 HMP39 INQ50 ?
A
JOR61B
JOS61C
JOR60D
JOS60Question 2639
Arithmetic
Harit starts from Point Y and drives 47 km towards the east. He then takes a right turn, drives 23 km, turns right and drives 26 km. He then takes a right turn and drives 52 km. He takes a left turn, drives 21 km. He then turns left, drives 11 km to stop at Point Z. How far (shortest distance) and towards which direction should he drive in order to reach Point Y again? (All turns are 90-degree turns only unless specified.)
A
18 km towards the southB
19 km towards the northC
20 km towards the southD
24 km towards the eastQuestion 2640
Arithmetic
Three numbers are in the ratio 1: 11:19, and their LCM is 8778. Their HCF is ______.
A
42B
36C
54D
50Question 2641
Arithmetic
The mode of the observations 35, 27, 27, 32, 25, 24, 27, 24, 32, 20, 31, 21, 29, 22, 27, 20 and 26 is:
A
35B
25C
27D
32Question 2642
Arithmetic
Deficiency of which nutrient is most directly linked to reduced oxygen-carrying capacity of blood?
A
IodineB
Vitamin AC
CalciumD
IronQuestion 2643
Arithmetic
One-third of a journey is covered at a speed of 31 km/hr, the next one-third of the journey is covered at a speed of 4 km/hr, and the remaining journey is covered at a speed of 34 km/hr. The average speed (in km/hr, rounded off to one decimal place) for the entire journey is:
A
3.1B
7.1C
9.6D
6.3Question 2644
Arithmetic
A sound wave with a period of $0.01$ seconds has a frequency of:
A
1000 HzB
10 HzC
0.1 HzD
100 HzQuestion 2645
Arithmetic
In Δ ABC, DE || AC, where D and E are the points on sides AB and BC, respectively. If BD = 10 cm and AD = 17 cm, then what is the ratio of the area of ΔBDE to the trapezium ADEC?
A
344 : 415B
629 : 100C
406 : 383D
100 : 629Question 2646
Arithmetic
A sum, when invested at 20% simple interest per annum, amounts to ₹8,640 after 3 years. What is the simple interest (in) on the same sum at the same rate in 2 years?
A
4,320B
2,160C
8,640D
1,080Question 2647
Arithmetic
When appointing judges to the Supreme Court, the President must consult which of the following?
A
The Union Public Service CommissionB
The Chief Justice of IndiaC
The Law Minister exclusivelyD
The Prime Minister onlyQuestion 2648
Arithmetic
Who among the following has been appointed as the Chairperson of National Commission for Women (NCW). in October 2024?
A
Arti SarinB
Vijaya Kishore RahatkarC
Anju Rathi RanaD
Amit KumarQuestion 2649
Arithmetic
What is the dual role of the highest judicial officer in a district?
A
District Judge for civil cases and Sessions Judge for criminal casesB
Chief Judicial Magistrate for civil cases and Munsiff for criminal casesC
Subordinate Judge for civil cases and Metropolitan Magistrate for criminal casesD
Nyaya Panchayat head for civil cases and Gram Kutchery head for criminal casesQuestion 2650
Arithmetic
Which of the following is the war dance of the Nagas?
A
Danda-JatraB
Thang TaC
RangmaD
Alkap