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

Explanation

D and B are at the extreme ends facing North. Since D is to the left of A, D occupies the 1st position from the left and B occupies the 4th position.

Since D and B face North, and exactly two people face in each direction, both A and C must face South.

Placing A at the 2nd position and C at the 3rd position gives the order D, A, C, B. Since A faces South, A's left points toward the 3rd position, which is occupied by C. Thus, C is the neighbour on A's left, and both A and C face South, satisfying all given conditions.

Explanation

In the expression L × W - K + F, L × W indicates that L is the father of W. The next segment W - K indicates that W is the sister of K, which means W and K are siblings. Since L is the father of W, L is also the father of K.

Explanation

The given expressions follow a pattern where a value is added to the given number and the result is squared: (2 + 5)² = 7² = 49 (8 + 7)² = 15² = 225

The added term ranges between 5 and 7. Applying these lower and upper bounding values to 12 gives: (12 + 5)² = 17² = 289 (12 + 7)² = 19² = 361

Any valid value for 12 under this logic must lie within the range of 289 to 361. The value 400 lies outside this range, so it cannot be a value of 12.

Explanation

The terms in the series follow the pattern n² - 1, where n is a sequence of consecutive even numbers starting from 2:

2² - 1 = 3 4² - 1 = 15 6² - 1 = 35 8² - 1 = 63 10² - 1 = 99

Alternatively, the differences between consecutive terms form an arithmetic progression increasing by 8: 12, 20, 28, and 36. Adding 20 to 15 yields 35.

Explanation

Since A and I are sitting to the immediate right and immediate left of B respectively, B is directly adjacent to both A and I, placing I on one side of B. Since H is sitting between I and D, H must be adjacent to I on the side opposite to B, forming the contiguous order B - I - H - D along the circle. Consequently, I is positioned directly between B and H.

Explanation

Argument (1) is weak because primary school children in class 2 (around 7–8 years old) are cognitively capable of understanding basic arithmetic concepts like multiplication, which is simply repeated addition.

Argument (2) is also weak because introductory multiplication tables are fundamental building blocks of early mathematics rather than excessively complex concepts that would inherently cause mental stress or fear of the subject.

Because both arguments rely on incorrect assumptions about early child cognitive capabilities and the complexity of elementary mathematics, neither argument provides a strong justification for the statement.

Explanation

Speed is a physical quantity measuring the rate of motion of an object over time, whereas Clutch, Brake, and Accelerator are mechanical control pedals used in a motor vehicle. Speed represents a measurable outcome or parameter rather than a physical automobile mechanism.

Explanation

By combining statement I (All mangoes are tablets) and statement II (All tablets are sweets), we establish the direct relationship that all mangoes are sweets, which validates conclusion (1). Since all mangoes are sweets, converting this universal affirmative relation yields that some sweets are mangoes, which validates conclusion (2). Therefore, both conclusions logically follow.

Explanation

Statement I asserts that all cows are dogs. The valid immediate inference of a universal affirmative statement (A-type) is a particular affirmative statement (Some dogs are cows), so conclusion (1) does not follow.

When combining Statement I and Statement II, the common middle term "dogs" acts as the predicate in both statements. Because it is undistributed in both premises, the rule of distributed middle is violated, meaning no definite conclusion can be drawn connecting cats and cows. Therefore, conclusion (2) does not follow.

Explanation

The statement highlights that people publicly opposing female foeticide are the ones who were personally involved in the act. Preaching against a social evil while engaging in it demonstrates that giving advice is easier than following it in practice, which directly supports conclusion (1). Additionally, acting in direct contradiction to one's stated stance exemplifies hypocrisy and dual behavior, which validates conclusion (2).

Explanation

A giraffe is most prominently characterized and distinguished by its height. In the same way, a tiger is primarily recognized and characterized by its distinct physical feature of stripes.

Explanation

Position of Ram from left = 6 Position of Suresh from left = 6 + 8 = 14

Position of Mohan from left = Total students + 1 - Position from right Position of Mohan from left = 21 + 1 - 10 = 12

Number of students between Suresh and Mohan = (Higher position - Lower position) - 1 Number of students between Suresh and Mohan = 14 - 12 - 1 = 1

Explanation

The terms in the series are the squares of consecutive multiples of 3:

3² = 9 6² = 36 9² = 81 12² = 144 15² = 225

Calculating 12² yields 144.

Explanation

A dictionary is a general reference book used to look up word definitions, spellings, and pronunciations, rather than being a holy scripture or religious text.

Explanation

To determine the relationship, break down the statement made by Mahesh to his daughter Preeti:

Preeti's paternal grandfather is Mahesh's father. The daughter of Preeti's paternal grandfather is Mahesh's sister. The only son of Mahesh's sister is Mahesh's nephew.

Since the person in the photograph is Mahesh's sister's son, Mahesh is his mother's brother (maternal uncle) and the person in the photograph is his nephew.

Explanation

Each letter of the word is represented by a pair of letters consisting of the letter immediately preceding it in the English alphabet followed by the letter itself.

Applying this pattern to CUP: C is preceded by B, giving BC. U is preceded by T, giving TU. P is preceded by O, giving OP.

Combining these pairs in order yields BCTUOP.

Explanation

Atul's maternal grandfather's only daughter is Atul's mother. Manoj is the son of Atul's mother, which means Manoj and Atul are sons of the same mother. Consequently, Atul is Manoj's brother.

Explanation

The production manager establishes a direct cause-and-effect link between below-average raw materials and substandard final production. This conclusion relies on the underlying premise that good-quality raw materials are essential to achieve standard or high-quality finished goods, making assumption (1) implicit in the manager's statement. Assumption (2) introduces the concept of cost, which is entirely extraneous to the statement because high cost does not automatically imply high quality, nor is monetary value mentioned or implied in the given premise.

Explanation

Sanjay's rank from the top = Total persons - Persons below Sanjay = 50 - 18 = 32nd.

The number of persons between two ranks = (Higher Rank - Lower Rank) - 1.

Substituting Mohan's rank (23rd) and Sanjay's rank (32nd): Number of players between them = (32 - 23) - 1 = 9 - 1 = 8.

Explanation

The given statement establishes a descriptive cause-and-effect relationship explaining that high levels of carbon dioxide result in a stronger greenhouse effect. It does not offer any normative judgments, directives, or recommendations regarding what levels of carbon dioxide or greenhouse effect should be maintained. Consequently, neither statement logically follows as an implicit assumption underlying the environmentalist's observation.

Explanation

Digits at odd positions (1st, 3rd, 5th) are reduced by 1, while digits at even positions (2nd, 4th, 6th) are squared.

For 618293: 1st digit: 6 - 1 = 5 2nd digit: 1² = 1 3rd digit: 8 - 1 = 7 4th digit: 2² = 4 5th digit: 9 - 1 = 8 6th digit: 3² = 9 Result: 517489

Applying the same rule to 437251: 1st digit: 4 - 1 = 3 2nd digit: 3² = 9 3rd digit: 7 - 1 = 6 4th digit: 2² = 4 5th digit: 5 - 1 = 4 6th digit: 1² = 1 Result: 396441

Explanation

A comb is a tool used for personal grooming and hair styling, whereas the other three items are articles of clothing or wearable apparel worn on the body.

Explanation

Wool is the primary raw material processed to produce a sweater. In the same way, milk serves as the primary raw material that undergoes fermentation to produce curd.

Explanation

Each letter of the word is shifted backwards by 2 positions in the alphabetical order: P - 2 = N I - 2 = G A - 2 = Y N - 2 = L O - 2 = M

Applying the same rule (-2 shift) to DRUM: D - 2 = B R - 2 = P U - 2 = S M - 2 = K

Explanation

A vaccine is administered to prevent an illness or disease before it occurs, defining its primary function. Similarly, a medicine is administered to cure an existing illness or disease, defining its primary function.

Explanation

The terms of the series follow the pattern Tₙ = n³ - n for n = 1, 2, 3, 4, 5...

T₁ = 1³ - 1 = 0 T₂ = 2³ - 2 = 6 T₃ = 3³ - 3 = 24 T₄ = 4³ - 4 = 60 T₅ = 5³ - 5 = 125 - 5 = 120

Explanation

An amalgam is an alloy formed by combining mercury with one or more other metals, making it a chemical mixture rather than a pure chemical element. It does not possess a unique atomic number or a fixed chemical element classification on the periodic table.

Explanation

In QU, the second letter is 4 positions ahead of the first letter in the English alphabetical order (Q = 17, U = 21). In all other clusters, the second letter is 5 positions ahead of the first letter.

Explanation

A logical course of action must be practical, feasible, and aimed at mitigating the problem without halting essential public infrastructure development. Implementing site screening to contain airborne particles and using water sprays to dampen construction dust are standard, effective dust-suppression measures that directly address short-term air pollution while allowing metro work to proceed safely.

Explanation

Taking the park as the origin (0, 0): Moving 75 m west reaches (-75, 0). Moving 25 m north reaches (-75, 25). Moving 35 m east reaches (-40, 25). Moving 25 m south reaches (-40, 0), which is the location of the bangle stall.

Since the bangle stall is located 40 m west of the origin, the park is 40 m to the east from the bangle stall.

Explanation

Statement 3 states that all topics taught by the professor, except Indian Education, are very graspable and motivating. The term graspable is synonymous with comprehensible. Since Indian Education is explicitly identified as an exception among the topics taught by the professor, it does not possess the quality of being very graspable or comprehensible.

Explanation

Jamie's sister's husband and Jamie's sister are a married couple. The son of Jamie's sister is Jamie's nephew. Since Sam is the son of Jamie's sister and her husband, Sam is Jamie's nephew.

Explanation

The pattern in the given series is based on adding consecutive squares of natural numbers:

5 + 1² = 6 6 + 2² = 10 10 + 3² = 19 19 + 4² = 35 35 + 5² = 60

Following this pattern, the next term is obtained by adding 6² to 60:

60 + 6² = 60 + 36 = 96

Explanation

Days combine to form a week, as a week is composed of seven days. Similarly, months combine to form a year, as a year is composed of twelve months. In this sequence of time measurement units, each pair represents a smaller unit of time followed by the larger unit that it directly constitutes.

Explanation

Statement A is a particular affirmative proposition of the form "Some A are B" (Some animals are colour-blind). By the rule of simple conversion in logic, any proposition of the form "Some A are B" directly yields "Some B are A". Therefore, "Some animals are colour-blind" directly implies that "Some colour-blinds are animals".

Explanation

Position from the left end = 12 + 5 = 17th letter.

In the standard English alphabetical sequence from left to right (A to Z), the 17th letter is Q.

Explanation

In this series, both the first and second letters of each term decrease by 3 in alphabetical position at each step:

First letters: w(23) → t(20) → q(17) → n(14) → k(11) → h(8) Second letters: p(16) → m(13) → j(10) → g(7) → d(4) → a(1)

Subtracting 3 from the positions of the letters in kd (k = 11, d = 4) gives position 8 (h) and position 1 (a).

Explanation

An advertisement specifically highlighting "pure and natural" honey implicitly assumes that non-pure or artificial honey exists and can be prepared, which drives the need to differentiate the product. Assumption I is therefore implicit. Assumption II is not implicit because the advertisement contains no mention of price or cost, so no assumption regarding consumers' willingness to pay higher prices can be inferred.

Explanation

Silver is a metallic chemical element, whereas all the other terms in the group represent playing cards in a standard card deck.

Explanation

Each letter in the given code language is shifted forward by 3 positions in the alphabetical series (+3 rule):

P (+3) = S, L (+3) = O, U (+3) = X, S (+3) = V L (+3) = O, I (+3) = L, V (+3) = Y, E (+3) = H

Applying the same rule to FREE: F (6) + 3 = 9 → I R (18) + 3 = 21 → U E (5) + 3 = 8 → H E (5) + 3 = 8 → H

Explanation

The given statements establish that all dragons are a subset of stars and that there is an overlap between dragons, stars, and thrones. However, the statements do not restrict the set of stars exclusively to thrones or dragons. It remains entirely possible for stars to exist outside both of these categories, so the assertion that every star must be either a throne or a dragon cannot be logically concluded.

Explanation

A cube is a three-dimensional geometric shape whose two-dimensional base or cross-sectional equivalent is a square. Similarly, a sphere is a three-dimensional geometric shape whose two-dimensional equivalent is a circle.

Explanation

The pattern in the series involves adding double the previous difference to each successive term:

14 - 9 = 5 24 - 14 = 10 (5 × 2) 44 - 24 = 20 (10 × 2)

Following this pattern, the next difference must be 20 × 2 = 40. Missing term = 44 + 40 = 84

Verification for subsequent terms: 84 + 80 = 164 (20 × 4 = 80) 164 + 160 = 324 (80 × 2 = 160)

Explanation

Range is a measure of dispersion (spread) that represents the difference between the highest and lowest values in a dataset, whereas mean, median, and mode are measures of central tendency used to identify the center of a data set.

Explanation

Converting the letters to their positional values in the English alphabet: C = 3 E = 5 H = 8 L = 12

The difference between consecutive terms increases by 1 at each step: 3 + 2 = 5 (E) 5 + 3 = 8 (H) 8 + 4 = 12 (L) 12 + 5 = 17 (Q)

The 17th letter of the alphabet is Q.

Explanation

The second term represents the primary action associated with the first term. A book is written, and similarly, cricket is played.

Explanation

There is no direct or definite indirect relationship established between keys and fish from the given statements. Keys are related to boats, and boats are related to pipes and fish, but there is no overlapping term linking keys directly to fish to form a valid definite conclusion.

Explanation

Umpire represents a living person (a match official who enforces the rules of a game), whereas the other terms refer to non-living physical areas or components of a sports venue.

Explanation

In the English alphabet, opposite letter-pairs have positional values that sum to 27 (letters equidistant from opposite ends). In Jh, J is the 10th letter and h is the 8th letter from the beginning, giving a sum of 18 (10 + 8 = 18), which does not form an opposite letter-pair.

Explanation

In the given pattern matrix, the positional value of the letters in each row follows an arithmetic relationship: in the first row, J (10) - F (6) = D (4); in the second row, E (5) - D (4) = 1, which corresponds to the letter A. Therefore, option A is the correct answer.