RRB-NTPC 2021 Mathematics

Practice subject-wise previous year questions

Question 2676
Arithmetic

Which keyboard shortcut is used to copy selected text in MS Word 365?

A
Ctrl + V
B
Ctrl + C
C
Ctrl + X
D
Ctrl + Z
Question 2677
Arithmetic

If the third proportional of 40 and Z is 10, then what is the positive value of Z?

A
21
B
19
C
20
D
17
Question 2678
Arithmetic

In a certain code language, 'LOST' is coded as '6832' and 'SALT' is coded as '2136'. What is the code for 'A' in the given code language?

A
3
B
6
C
1
D
2
Question 2679
Arithmetic

What should come in place of the question mark (?) in the given series?   1514 1513 1517 1508 1524 ?

A
1478
B
1499
C
1476
D
1474
Question 2680
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 pulse are rice. All rice are wheat. All wheat are corn. Conclusions: (I) All pulse are corn. (II) Some corn are rice.

A
Neither conclusion (I) nor (II) follows
B
Both conclusions (I) and (II) follow
C
Only conclusion (II) follows
D
Only conclusion (I) follows
Question 2681
Arithmetic

If 3 is added to each even digit and 2 is added to each odd digit in the number 413257, what will be the sum of the first and last digits in the new number thus formed?

A
14
B
12
C
10
D
16
Question 2682
Arithmetic

If the selling price of a bed is 2-times of initial, then the profit is 8-times of initial. Find the initial profit percentage (in %).

A
300
B
400
C
25
D
16.67
Question 2683
Arithmetic

Mr. Becks starts from Point A and drives 9 km towards the East. He then takes a right turn, drives 16 km, turns right and drives 28 km. He then takes a right turn and drives 21 km. He takes a final right turn, drives 19 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again? (All turns are 90 degrees turns only unless specified.)

A
5 km to the South
B
3 km to the North
C
7 km to the South
D
1 km to the North
Question 2684
Arithmetic

Who were the 'Rajukas' during the Mauryan period?

A
Provincial officials
B
Militias
C
Craftsmen
D
Army administrators
Question 2685
Arithmetic

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? HKP22 ILQ31 JMR40 KNS49?

A
LOT59
B
 LOS59
C
LOT58
D
LOS58
Question 2686
Arithmetic

A, B, C, D, E and F live on six different floors of the same building. The lowermost floor in the building is numbered 1, the floor above it, number 2 and so on, till the topmost floor is numbered 6. B lives on an odd numbered floor but not 3. The sum of floors on which B and D live is 7. E lives immediately below F. C lives on the top floor. How many people live above E?

A
2
B
4
C
3
D
1
Question 2687
Arithmetic

Consider the following statements regarding Operation Brahma, launched in March 2021. The operation was launched by the Government of India to assist Myanmar and Thailand after a major earthquake. Indian Navy ships Satpura and Savitri from the Eastern Naval Command sailed for Yangon with relief material. The Indian Army deployed a 118-member medical task force from the Shatrujeet Brigade as part of the relief efforts. A 60-bed Medical Treatment Centre was set up by the Indian Army in Thailand for trauma and emergency care. Which of the above statements are correct?

A
Only 1 and 4
B
Only 2 and 3
C
1, 2, 3 and 4
D
Only 1, 2 and 3
Question 2688
Arithmetic

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?   SPM 8, TQN 14, URO 20, VSP 26, ?

A
WQM 30
B
XPM 30
C
WTQ 32
D
XRN 32
Question 2689
Arithmetic

Which two numbers should be interchanged to make the following equation correct? (Note: The entire number should be interchanged and not individual digits of a given number.) $24 \times 3 + (32 \div 4) - 10 \times 8 + 26 = 196$

A
4 and 8
B
3 and 8
C
 26 and 24
D
24 and 32
Question 2690
Arithmetic

A group of people consists of men, women and children. Among them, 20% are men, 30% are women and the rest are children, and their average weights are 50 kg, 40 kg and 30 kg, respectively. The average weight of the group (in kg) is:

A
37
B
36
C
34
D
35
Question 2691
Arithmetic

Hiromi Kawakami's speculative fiction novel, shortlisted for the 2021 International Booker Prize, is titled:

A
Strange Weather in Tokyo
B
The Nakano Thrift Shop
C
  Under the Eye of the Big Bird
D
The Ten Loves of Nishino
Question 2692
Arithmetic

Which of the following numbers is divisible by 44?

A
3379
B
2967
C
3550
D
3344
Question 2693
Arithmetic

A water tank can be filled in 19 minutes by using 39 pipes of the same capacity. In how many minutes (rounded off to two decimal places) will the water tank be filled if we use 23 pipes of the same capacity as above?

A
24.73
B
32.22
C
27.49
D
37.03
Question 2694
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) 4 $ 4 2 2 7 4 1 8 € 6 9 3 £ 3 £ 9 @ % 9 # £ (Right) How many such numbers are there each of which is immediately preceded by a number and also immediately followed by a symbol?

A
3
B
1
C
2
D
4
Question 2695
Arithmetic

Kalpana and Sudha got 656 and 697 marks, respectively, in the same examination. If Kalpana scored 32% marks, then what is the percentage of marks scored by Sudha?

A
32%
B
35%
C
34%
D
37%
Question 2696
Arithmetic

The sides of a triangle are 109 cm, 171 cm, and 100 cm. What is the length (in cm) of its altitude corresponding to the side with a length of 171 cm?

A
94
B
49
C
60
D
82
Question 2697
Arithmetic

According to World Bank's State of Social Protection Report 2021, as of 2022, how many people in low- and middle-income countries lacked adequate social protection coverage?

A
04 billion
B
02 billion
C
05 billion
D
03 billion
Question 2698
Arithmetic

What was the theme for the Republic Day 2021 celebrations in India?

A
Swarnim Bharat: Virasat Aur Vikas
B
Celebrating the Constitution
C
Unity in Diversity
D
India@75: A Nation Marching Forward
Question 2699
Arithmetic

According to the World Bank 2021 data, what was the poverty rate at $2.15 a day (2017 PPP) for India?

A
12.92%
B
8.90%
C
15%
D
10.50%
Question 2700
Arithmetic

Who is known as the 'Mother of Indian Revolution' for her pioneering role in the early Indian independence movement and for unfurling the first version of the Indian national flag abroad?

A
Vijaya Lakshmi Pandit
B
Annie Besant
C
Madam Bhikaji Cama
D
Sarojini Naidu