RRB NTPC CBT 1 2021 General Intelligence & Reasoning Questions with Solutions

Explanation

Based on the given conditions, the seating arrangement on the ladder from top (position 7) to bottom (position 1) is P (7), S (6), A (5), D (4), B (3), R (2), and Q (1).

In the pairs S D, B Q, and P A, there is exactly one person sitting between the two individuals. In the pair D B, D and B are seated adjacent to each other with no person in between.

Explanation

The series follows three separate patterns for each component of the terms:

First letter advances by 3 positions in alphabetical order: O (+3) → R (+3) → U (+3) → X (+3) → A.

Middle number follows the rule n² + 1 for n = 1, 2, 3, 4, 5: 1² + 1 = 2, 2² + 1 = 5, 3² + 1 = 10, 4² + 1 = 17, and 5² + 1 = 26.

Third letter advances by 2 positions in alphabetical order: F (+2) → H (+2) → J (+2) → L (+2) → N.

Explanation

Replacing the mathematical symbols with their assigned operations in the expression 12 × 4 – 7 ÷ 2 + 3 gives:

12 ÷ 4 + 7 - 2 × 3

Applying the BODMAS rule for order of operations: First, perform division: 12 ÷ 4 = 3 Next, perform multiplication: 2 × 3 = 6 Then, evaluate addition and subtraction: 3 + 7 - 6 = 4

Explanation

Break down the relationship step-by-step from the innermost phrase:

"Father of my son" is Roma's husband (or Roma himself). "Daughter of the father of my son" is Roma's daughter. "Son of the daughter" is Roma's daughter's son.

Explanation

The terms in the series follow the formula n³ − n for integer values of n starting from 2:

2³ − 2 = 6 3³ − 3 = 24 4³ − 4 = 60 5³ − 5 = 120 6³ − 6 = 210 7³ − 7 = 343 − 7 = 336

Explanation

Panaji, Patna, and Mumbai are the capital cities of Indian states—Goa, Bihar, and Maharashtra respectively. Surat, located in Gujarat, is not a state capital, as the capital of Gujarat is Gandhinagar.

Explanation

The given statement establishes a relation specifically between hard work and getting good grades. Conclusion I equates getting good grades with general success, which is an overgeneralization beyond the scope of the statement. Conclusion II discusses whether success is important to individuals, a subjective aspect completely unaddressed in the statement. Thus, neither conclusion logically follows from the given premise.

Explanation

Kundan is good in History and Sanskrit according to the first statement, and also proficient in Science and Sanskrit according to the third statement. Combining these details shows that Kundan is good in all three subjects: History, Science, and Sanskrit.

Explanation

The relationship in the pair is based on the characteristic mode of movement of the animal. Just as hopping is the movement associated with a rabbit, crawling is the movement associated with a snake.

Explanation

Since Raj is the son of Radha, and Rahul is the brother of Raj, both Rahul and Raj are siblings born to Radha. Therefore, Rahul is the son of Radha.

Explanation

A bat is the primary instrument used by a player to strike the ball in cricket. Similarly, a racquet is the primary piece of equipment used by a player to strike the ball in tennis.

Explanation

The pattern in each row relates the first, second, and third numbers by the formula:

First term = (Second term × Third term) ÷ 4

Applying this to the given rows: Row 1: (24 × 8) ÷ 4 = 192 ÷ 4 = 48 Row 2: (20 × 11) ÷ 4 = 220 ÷ 4 = 55

For Row 3, letting the missing number be x: (x × 9) ÷ 4 = 63 x × 9 = 63 × 4 x × 9 = 252 x = 252 ÷ 9 = 28

Explanation

A mouse is an external peripheral input device used to interact with a computer system, whereas the other three are internal core hardware components located inside the main computer cabinet.

Explanation

By deduction from the given clues, A is not married to P (married to C), R (married to E), Q, or T, which means A is married to S. The remaining women for B and D are Q and T. Since B is not married to T, B must be married to Q.

For the shirt colours, A likes Green and D likes Pink. Since both C and E do not like Black, the Black shirt must belong to B. Combining these deduced facts uniquely yields the combination B-Q-Black.

Explanation

The pattern followed in each column is: (First row × Second row) - Third row = Fourth row.

Column 1: (4 × 5) - 6 = 20 - 6 = 14 Column 2: (5 × 4) - 4 = 20 - 4 = 16 Column 3: (6 × 4) - 5 = 24 - 5 = 19

Explanation

Converting the letters into their numerical positions in the alphabet reveals a pattern in groups of three:

J (10), L (12), K (11) M (13), O (15), N (14) P (16), R (18), Q (17)

Each group starts with the next consecutive integer and follows a pattern of +2 to get the second letter, followed by -1 to get the third letter.

For the fourth group starting with S (19): Second position = 19 + 2 = 21, which corresponds to U Third position = 21 - 1 = 20, which corresponds to T

Explanation

The standard relation followed by the given pairs is that the sum of the alphabetical positions of the letters in the second cluster is 18 more than the sum of the alphabetical positions in the first cluster.

For ZBN - EHU: Position sum of ZBN = 26 + 2 + 14 = 42 Position sum of EHU = 5 + 8 + 21 = 34 The difference between the sums is 34 - 42 = -8 instead of +18, making it the odd one out.

Explanation

The series consists of two alternating patterns based on the alphabetical position of each letter.

Odd-positioned letters (1st, 3rd, 5th, 7th) follow a pattern of adding 3 to the position: E(5) + 3 = H(8), H(8) + 3 = K(11), K(11) + 3 = N(14).

Even-positioned letters (2nd, 4th, 6th, 8th) follow a pattern of subtracting 3 from the position: V(22) - 3 = S(19), S(19) - 3 = P(16), P(16) - 3 = M(13).

The sixth letter in the series is Q(17) instead of P(16).

Explanation

From the statement "All rats are cats", we can directly infer its logical converse, "Some cats are rats", using standard logical conversion. Since the set of all rats is entirely contained within the set of cats, part of the cat category is necessarily made up of rats. Therefore, conclusion III definitely follows.

Explanation

Replacing the signs according to the given rules: '+' is replaced by '×' '÷' is replaced by '+' '×' is replaced by '-' '-' is replaced by '+'

Substituting these into the expression: 8 × 6 + 12 - 4 + 2 = 58

Applying BODMAS rules, multiplication is performed first: 48 + 12 - 4 + 2 = 58

Performing addition and subtraction from left to right: 60 - 4 + 2 = 58 56 + 2 = 58 58 = 58

Explanation

An assumption is an unstated premise required to support a statement. Assumption 1 is not implicit because recommending private schools for good education does not mean that only private schools have good teachers; the use of extreme words like "only" invalidates the assumption. Assumption 2 is not implicit because the statement makes no reference to fees, cost, or financial value, making any premise regarding hefty fees an out-of-scope extrapolation.

Explanation

Workbook is an educational activity book containing practice exercises, problems, and spaces for students to write answers directly. The other three words represent periodic publications designed primarily for reading and conveying news, updates, and articles to an audience.

Explanation

C is a Clerk and F is an IT Officer. B cannot be a driver, economist, doctor, or PO, which leaves Lawyer as the only possible profession for B. Since A, B, C, D, E, and F cannot be doctors, G must be the Doctor. Similarly, since A, B, C, E, F, and G cannot be economists, D must be the Economist. This leaves the remaining professions of PO and Driver to be shared between A and E. Therefore, A could be working as a PO.

Explanation

The pattern followed in the given code language is the reversal of the word's letter sequence.

HOUSE written in reverse order becomes ESUOH.

Applying the same reversal logic to CLOCK: C - L - O - C - K reversed gives K - C - O - L - C.

Explanation

The pattern adds increasing whole numbers starting from 0 to the alphabetical positions of each letter:

T (+0) = T E (+1) = F A (+2) = C C (+3) = F H (+4) = L E (+5) = J R (+6) = X

Applying the same incrementing shift to TABLE:

T (+0) = T A (+1) = B B (+2) = D L (+3) = O E (+4) = I

Explanation

Raju's mother's father is Raju's maternal grandfather. Since Raju's mother is the only child of her parents, all grandchildren of Raju's maternal grandfather must be the children of Raju's mother. The only granddaughter is therefore Raju's mother's daughter, Sunita. As Raju is a male child of the same mother, Raju is Sunita's brother.

Explanation

Chandigarh is a Union Territory, whereas Patna, Bengaluru, and Itanagar are state capitals located within Indian states. Additionally, Chandigarh serves as a shared administrative capital for two different states, Punjab and Haryana, while itself being governed directly as a Union Territory by the Central Government.

Explanation

D is scheduled before Friday, C is placed immediately before D, and there is a gap of two days between E and D. Thus, E is on Monday, C is on Wednesday, and D is on Thursday.

Since no lecture is organised immediately after E, Tuesday is the off day with no lecture.

A is scheduled on Saturday. Since F cannot be organised on the last day (Sunday), F is on Friday and B is on Sunday.

The schedule from Monday to Sunday is E on Monday, No Lecture on Tuesday, C on Wednesday, D on Thursday, F on Friday, A on Saturday, and B on Sunday.

Between E on Monday and F on Friday, two lectures (C and D) are organised.

Explanation

Recommending a specific minimum age of around 5 years for starting school assumes that a child reaches the necessary mental, physical, and cognitive readiness for structured education around that age. Consequently, the statement inherently relies on the premise that prior to reaching 5 years of age, a child has not yet attained the appropriate level of development and capacity to learn effectively in a school environment.

Explanation

Her daughter's daughter refers to the woman's granddaughter through her daughter. Being the maternal uncle of this granddaughter means Rohan is the brother of her daughter. Since Rohan is the brother of the woman's daughter, Rohan is the woman's son, which makes the woman Rohan's mother.

Explanation

The coding pattern adds a progressively increasing shift to each letter according to its positional index, starting with +0 for the first letter and increasing by +1 for each subsequent letter.

In TEACHER: T + 0 = T E + 1 = F A + 2 = C C + 3 = F H + 4 = L E + 5 = J R + 6 = X

Applying the same positional increments to CATCHER: C + 0 = C A + 1 = B T + 2 = V C + 3 = F H + 4 = L E + 5 = J R + 6 = X

This produces the coded word CBVFLJX.

Explanation

Since all kites are birds and no bird is a bat, the set of kites is entirely contained within the set of birds, which shares no elements with the set of bats. Therefore, no kite can be a bat, making conclusion I logically follow while conclusion II directly contradicts this established relationship.

Explanation

The SI unit used to measure length is the meter. In the same way, the standard SI unit used to measure mass is the kilogram.

Explanation

Each letter in the three-letter sequence advances by one position (+1) in alphabetical order across the series:

First letter: C → D → E → F Second letter: K → L → M → N Third letter: V → W → X → Y

Following this pattern, the next term in the series is FNY.

Explanation

To find the numbers that are immediately preceded by a letter and immediately followed by a symbol, search for the pattern Letter - Number - Symbol in the given sequence Np4@8cQ9%6TkF3=5g4 | RwJX.

The combinations satisfying this condition are p4@, Q9%, F3=, and g4 | . In each case, the number is preceded by a letter and followed by a symbol, yielding a total count of 4.

Explanation

A reader represents the end consumer who consumes published content. In contrast, the remaining entities are involved on the supply side in the creation, printing, and distribution stages of the publication process.

Explanation

Cochlea is a fluid-filled, spiral-shaped organ located in the inner ear that plays a critical role in hearing by converting acoustic sound vibrations into electrical nerve impulses. Pupil, cornea, and iris are all anatomical components of the human eye.

Explanation

Combining the premise "Some dogs are white" with "All white things are beautiful" using the standard syllogistic rule (I + A = I) directly yields "Some dogs are beautiful", so conclusion II logically follows. Conclusion I does not follow because the statement "Some dogs are white" implies only that some white things are dogs, which is insufficient to claim that all beautiful white things are dogs.

Explanation

Let B be the total number of boys and G be the total number of girls in the family.

From the boy's perspective, his number of brothers is B - 1 and his number of sisters is G: G = 2 × (B - 1)

From the sister's perspective, her number of brothers is B and her number of sisters is G - 1: B = G - 1

Substituting B = G - 1 into the first equation: G = 2 × (G - 1 - 1) G = 2 × (G - 2) G = 2G - 4 G = 4

Substituting G = 4 back gives B = 3, confirming there are 4 girls and 3 boys in the family.

Explanation

The logical sequence follows the natural chronological progression of a health condition: an Infection enters the body, which develops into a Disease. Upon experiencing symptoms, a patient undergoes Diagnosis to identify the issue, after which appropriate Treatment is administered, leading to final Recovery.

Explanation

Interchanging the signs + and ÷, and interchanging the numbers 7 and 9 in the equation 7 + 3 × 4 ÷ 9 - 5 = 14 gives:

9 ÷ 3 × 4 + 7 - 5 = 14

Evaluating the left-hand side using the order of operations (BODMAS): Division: 9 ÷ 3 = 3 Multiplication: 3 × 4 = 12 Addition: 12 + 7 = 19 Subtraction: 19 - 5 = 14

Explanation

Converting the letters to their numerical positions in the English alphabet: W = 23, U = 21, R = 18, I = 9, C = 3

The series follows a pattern of subtracting increasing consecutive integers: 23 - 2 = 21 (U) 21 - 3 = 18 (R) 18 - 4 = 14 (N) 14 - 5 = 9 (I) 9 - 6 = 3 (C)

The 14th letter of the alphabet is N.

Explanation

When a government announces multiple concessions and attractive schemes specifically targeted at foreign tourists, it demonstrates a clear and focused intent, showing that the government is serious about attracting foreign tourists. Furthermore, such incentives and concessions reduce costs and add value, which naturally encourages travel and makes it highly likely that a larger number of foreign tourists will visit the country. Thus, both conclusions logically follow from the given statement.

Explanation

Substituting the operators as specified (+ becomes ÷, - becomes ×, × becomes +, and ÷ becomes -) into the expression gives:

7 - 2 + 6 ÷ 3 × 4

Applying the BODMAS rule: Division: 6 ÷ 3 = 2 Multiplication: 2 × 4 = 8 Addition and Subtraction: 7 - 2 + 8 = 13

This equals the right-hand side value of 13.

Explanation

A stapler is an instrument used to hold and organize sheets of paper, just as a hanger is an instrument used to hold and organize clothes.

Explanation

The coding pattern alternates between shifting letters at odd positions backward by 2 places (-2) and keeping letters at even positions unchanged.

For CARPENTER: C (-2) = A, A (0) = A, R (-2) = P, P (0) = P, E (-2) = C, N (0) = N, T (-2) = R, E (0) = E, R (-2) = P, resulting in AAPPCNREP.

Applying the same logic to KITCHEN: K (-2) = I I (0) = I T (-2) = R C (0) = C H (-2) = F E (0) = E N (-2) = L

This yields the word IIRCFEL.

Explanation

Total number of students in a row = (Position from left) + (Position from right) - 1

Substituting the given values: Total = 7 + 20 - 1 = 26

Rohan's position is counted twice—once from the left and once from the right—so subtracting 1 gives the exact number of students in the row.

Explanation

From the given statements, Raj is immediately above Ritz and Ritz is immediately above Abi, forming the consecutive top-to-bottom sequence: Raj, Ritz, Abi.

Since two persons sit between Ritz and Das, and Das sits below Abi, Das must be placed three positions below Ritz. The full top-to-bottom arrangement on the ladder is:

Raj Ritz Abi Brij Das

Between Raj (1st position) and Das (5th position), there are three persons: Ritz, Abi, and Brij.

Explanation

When finding a character that is n-th to the right of the m-th character from the right end, subtract the positions: 18 - 5 = 13th character from the right end.

Counting from the right end of the given series: X is 1st, J is 2nd, w is 3rd, R is 4th, | is 5th, 4 is 6th, g is 7th, 5 is 8th, = is 9th, 3 is 10th, F is 11th, k is 12th, and T is 13th.

Explanation

The family of 7 people consists of 3 couples, meaning 6 of the members are married.

The Artist and Politician form the first couple and have 3 children, which accounts for 5 family members (2 parents + 3 children).

The remaining 5 professionals are the Engineer, Accountant, Doctor, Businessman, and Teacher. Engineer is married to Accountant, forming the second couple. Doctor and Businessman are brothers, which means Engineer, Doctor, and Businessman are the 3 male children of the Artist and Politician.

The Teacher forms the third couple by marrying one of the remaining brothers (Doctor or Businessman). Since Doctor is the brother of Engineer, marrying Doctor makes the Teacher the sister-in-law of Engineer's wife (the Accountant). Thus, the Doctor can be the husband of the Teacher.