RRB-NTPC 2021 Mathematics
Practice subject-wise previous year questions
Question 2951
Arithmetic
In February 2021, how much total budget was allocated to the Ministry of Youth Affairs and Sports in the Union Budget?
A
₹3,790 croreB
₹3,254 croreC
₹4,132 croreD
₹2,808 croreQuestion 2952
Arithmetic
If 1 is added to each even digit and 2 is subtracted from each odd digit in the number 936245, then how many digits will appear more than once in the new number thus formed?
A
ThreeB
NoneC
OneD
TwoQuestion 2953
Arithmetic
Ravi spends ₹250 on Monday, ₹300 on Tuesday, ₹275 on Wednesday, ₹325 on Thursday, and ₹350 on Friday. What is his average daily expenditure over these five days?
A
₹300B
₹320C
₹310D
₹280Question 2954
Arithmetic
The surface area (in cm²) of a sphere of radius 14 cm is: Take π = 22/7
A
2467B
2462C
2465D
2464Question 2955
Arithmetic
If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 8315476, which of the following digits will be third from the right?
A
4B
6C
8D
2Question 2956
Arithmetic
The Sixth Schedule of the Indian Constitution deals with the administration of tribal areas in which region?
A
Central IndiaB
Andaman and Nicobar IslandsC
Western GhatsD
North-East IndiaQuestion 2957
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 :: ? #: XTR :: LHF: %
A
# = DTX, % = FBZB
# = DZX, % = FBZC
# = UZX, % = FBZD
# = DZX, % = FBOQuestion 2958
Arithmetic
What should come in place of the question mark (?) in the given series? 4 7 13 24 42 ? 107
A
68B
66C
69D
67Question 2959
Arithmetic
The area of a quadrilateral ABCD is 324 cm². The lengths of the perpendiculars from the vertices B and D to the diagonal AC are 12 cm and 15 cm, respectively. Determine the length (in cm) of the diagonal AC.
A
24B
19C
27D
28Question 2960
Arithmetic
By using a suitable identity, simplify 10.1 3 .
A
1003.301B
1030.301C
1030.323D
1030.3001Question 2961
Arithmetic
If 2 is added to each odd digit and 1 is subtracted from each even digit in the number 7156423, then how many digits will appear more than once in the new number thus formed?
A
TwoB
ThreeC
OneD
NoneQuestion 2962
Arithmetic
Mr. HIJ starts from Point A and drives 21 km towards the south. He then takes a right turn, drives 19 km, turns right and drives 26 km. He then takes a right turn and drives 19 km, turns right and drives 2 km. He then takes a left turn and drives 4 km. He takes a final right turn, drives 3 km and stops at Point P. How far (shortest distance) and in which direction should he drive in order to reach Point A again? (All turns are 90-degree turns only unless specified)
A
7 km to the eastB
5 km to the southC
6 km to the northD
4 km to the westQuestion 2963
Arithmetic
The income of a person increases by 15% annually. If the initial income is ₹70,000, calculate the income after 2 years.
A
₹92,575B
₹91,575C
₹91,875D
₹92,175Question 2964
Arithmetic
Which of the following has dimensional formula [M⁰ L⁰ T ⁻ ²]?
A
StrainB
Angular accelerationC
FrequencyD
Angular velocityQuestion 2965
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 1 8 6 7 4 # 2 @ & Code Y A L B S D E Z C 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.0 (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 second and third elements are perfect squares, the third element is to be coded as the code for the second element. What will be the code for the following group? #6 @ 2
A
ELDZB
EZLDC
ELZDD
DZLEQuestion 2966
Arithmetic
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statements. Statements: All animals are deer. All animals are bears. All animals are cows. Conclusions: (I) All deer are cows. (II) Some cows are bears.
A
Only conclusion (I) follows.B
Only conclusion (II) follows.C
Neither conclusion (I) nor (II) follows.D
Both conclusions (I) and (II) follow.Question 2967
Arithmetic
If the fourth proportion to P, 4 and 3 is 6, then find the value of P.
A
5B
4C
3D
2Question 2968
Arithmetic
In this question, a group of number/symbol is coded using letter codes as per the codes given below and the conditions which follow. The correct combination of codes following the conditions is your answer. 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 @ 2 9 5 $ & 3 % # 7 + 4 8 6 Code A C D J F E W Q G P R B U S 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 second and third elements are perfect squares, the third element is to be coded as the code for the second element. What is @9#7 coded as?
A
ADGPB
PDGAC
GPDAD
PGDAQuestion 2969
Arithmetic
The average of 8 numbers is 16. The average of 6 of these numbers is 16. The average of the remaining two numbers is:
A
17B
15C
16D
18Question 2970
Arithmetic
What will the following PowerShell command in Windows OS do? Command: Remove-Item C:\Logs -Recurse -Force
A
Delete only empty folders under C:\LogsB
Move the C:\Logs folder to the Recycle BinC
Only delete files, leave folders intactD
Delete all files and subfolders inside C:\Logs, including the folder itselfQuestion 2971
Arithmetic
Each of the digits in the number 1673459 is arranged in ascending order from left to right. The position(s) of how many digits will remain unchanged as compared to that in the original number?
A
OneB
NoneC
ThreeD
TwoQuestion 2972
Arithmetic
Five solid cubes, each of volume 5,92,704 cm³, are joined end to end to form a cuboid. What is the lateral surface area (in cm²) of the cuboid?
A
84,774B
84,898C
84,672D
84,863Question 2973
Arithmetic
B is the mother of A. C is the sister of A's father D. E is the brother of C. How is B related to E?
A
Brother's wifeB
SisterC
WifeD
MotherQuestion 2974
Arithmetic
In March 2021, India introduced anti-dumping duties on five products imported from which country?
A
BangladeshB
JapanC
The United States of AmericaD
ChinaQuestion 2975
Arithmetic
Education remained largely inaccessible to the masses during colonial rule. What was India's literacy rate around 1947?
A
Close to 90%B
Over 75%C
Below 20%D
Around 50%