RRB-NTPC 2021 Mathematics
Practice subject-wise previous year questions
Question 2601
Arithmetic
A sum, when invested at 20% simple interest per annum, amounts to ₹4,800 after 3 years. What is the simple interest (in ₹) on the same sum at the same rate in 1 year?
A
2,400B
1,200C
600D
300Question 2602
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 birds are omnivores. All omnivores are lions. Some birds are reptiles. Conclusions: (I) Some omnivores are reptiles. (II) Some reptiles are lions.
A
Both conclusions (I) and (II) follow.B
Only conclusion (I) follows.C
Only conclusion (II) follows.D
Either conclusion (I) or (II) follows.Question 2603
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. No one has the exam before V. Only four people have exams between P and R. Q has the exam immediately before R. T has the exam before U but after S. How many people have exams between S and R?
A
ThreeB
FourC
OneD
TwoQuestion 2604
Arithmetic
A salesman marks his good 84% above the cost price and gives a discount of 50% on them. Find the percentage of this gain or loss.
A
5% gainB
9% lossC
6% gainD
8% lossQuestion 2605
Arithmetic
Which of the following statements is NOT correct with reference to the periodic trend of metallic character?
A
Metallic character decreases across a period from left to right.B
Metallic character increases across a period from left to right.C
Metallic character increases down a group.D
The change from metallic to non-metallic is gradual.Question 2606
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. T has an exam on Friday. Exactly 3 people have an exam between P and U, neither of whom has on exam on Sunday. S has an exam immediately after Q. V has an exam immediately before U. How many people have an exam after S?
A
3B
1C
4D
2Question 2607
Arithmetic
A, B, C, D, E, F, and G are sitting around a circular table facing the centre. A sits to the immediate left of G. D sits to the immediate left of B. B sits second to the left of F. E sits third to the left of G. How many people sit between C and F when counted from the left of C?
A
TwoB
OneC
ThreeD
FourQuestion 2608
Arithmetic
Who among the following has become the first woman officer to take over as the Director General, Armed Forces Medical Services, in October 2024?
A
Vijaya Kishore RahatkarB
Deena MehtaC
Anju Rathi RanaD
Arti SarinQuestion 2609
Arithmetic
What should come in place of the question mark (?) in the given series? 319, 296, 263, ?, 167, 104
A
220B
200C
210D
230Question 2610
Arithmetic
KARJ is related to NDUM in a certain way based on the English alphabetical order. In the same way, PLBF is related to SOEI. To which of the following is SCHQ related, following the same logic?
A
UFNRB
VELTC
VFKTD
UEMRQuestion 2611
Arithmetic
The mode of the observations 35, 32, 28, 27, 25, 32, 31, 27, 32, 30, 32, 27, 31, 34, 32 and 22 is:
A
28B
32C
35D
27Question 2612
Arithmetic
What should come in place of the question mark (?) in the given series? 327, 304, 271, ?, 175, 112
A
248B
218C
228D
238Question 2613
Arithmetic
Which Indian Bank has outlined the details of its Embassy Deposits, which are exclusively available to diplomats, non-diplomatic staff and diplomatic missions in March 2021?
A
HDFC BankB
Bandhan BankC
Bank of BarodaD
Axis BankQuestion 2614
Arithmetic
If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 7643185, what will be difference between the highest and lowest digits in the number thus formed?
A
4B
7C
5D
6Question 2615
Arithmetic
In which year was the Smart Cities Mission launched to enhance the quality of life in 100 selected cities by providing efficient services, robust infrastructure, and a sustainable environment?
A
2015B
2012C
2014D
2013Question 2616
Arithmetic
If the selling price of a bed is 2-times of initial, then the profit is 7-times of initial. Find the initial profit percentage (in %).
A
250B
20C
28.57D
350Question 2617
Arithmetic
What was a notable feature of the 'Tiger Triumph 2021' joint military exercise between India and the United States?
A
Exclusive focus on counter-terrorism operationsB
Inclusion of the United States Space Force for the first timeC
Participation limited to naval forces onlyD
Conducted solely in the Arabian Sea regionQuestion 2618
Arithmetic
Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which is the letter-cluster pair that DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
A
IJ - DEB
GH - BCC
LM - GHD
MN - PDQuestion 2619
Arithmetic
Two numbers are in the ratio 7: 11. If the first number is increased by 10 and the second number is decreased by 20, then the ratio becomes 2: 3. What is the sum of the original two numbers?
A
1240B
1254C
1260D
1268Question 2620
Arithmetic
Two sets of numbers are given below. In each set of numbers, certain mathematical operation(s) on the first number results in the second number. Similarly, certain mathematical operation(s) on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the given sets? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 - Operations on 13 such as adding / subtracting / multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) 11-22-44-45; 3-6-12-13
A
1-2-3-6B
19-20-22 - 44C
4-8-16-17D
13-14-15 - 20Question 2621
Arithmetic
Who among the following is responsible for implementing decisions made by a Municipal Corporation's council and standing committees in India?
A
Deputy MayorB
Standing Committee HeadC
Municipal CommissionerD
ChairmanQuestion 2622
Arithmetic
If $a + b = 33$, and $a - b = 37$, find the value of $(a + b)^2$.
A
1152B
1101C
1089D
1181Question 2623
Arithmetic
In a certain code language, 'PEAR' is coded as '7481' and 'DEAR' is coded as '7154'. What is the code for 'D' in the given code language?
A
7B
4C
1D
5Question 2624
Arithmetic
Who among the following first coined the term 'judicial activism'?
A
Justice PN BhagwatiB
Justice VR Krishna IyerC
DA DesaiD
Arthur Schlesinger Jr.Question 2625
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 to be followed directly as given in the table. Number/Symbol 3 # 8 $ 7 & 6 * 4 ^ 2 9 @ Code B S D F G H J K L P R W M 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 squares, then the code of the second element will be the code for the third element. What will be the code for the following group? 849@
A
DLUCB
CLUDC
DULCD
DLLM