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

Explanation

Based on the given conditions, the seven persons are seated around the circular table in clockwise order as follows: Suman (facing inward), Naresh, Jitu (facing outward), Jeevan (facing inward), Mayank (facing outward), Jitender, and Manjeet.

Mayank is seated between Jeevan and Jitender. Jeevan is sitting at the position immediately adjacent to Mayank, making Jeevan an immediate neighbour of Mayank.

Explanation

From statements 1 and 2, all drums are flutes and no flute is a mike, which directly implies that no drum is a mike. Statement 3 establishes that some mikes are bands, but does not provide any definite relationship between bands and flutes or bands and drums.

Conclusion I does not follow because bands may or may not overlap with flutes. Conclusion II does not follow because bands can potentially overlap with drums outside the category of mikes without violating any given statements. Conclusion III contradicts the established fact that no drum is a mike. Thus, none of the given conclusions logically follow.

Explanation

Geetam is the daughter of Gita, and Rajbir is Geetam's paternal grandfather. This means Rajbir is the father of Geetam's father. Since Jayant is the only son of Rajbir, Jayant must be Geetam's father. Because Geetam is the daughter of both Gita and Jayant, Jayant is Gita's husband.

Explanation

The code is obtained by taking the sum of the alphabetical positions of all letters in the word and subtracting 5 from it.

For KNSB: K(11) + N(14) + S(19) + B(2) = 46, and 46 - 5 = 41. For CPFG: C(3) + P(16) + F(6) + G(7) = 32, and 32 - 5 = 27. For FIJK: F(6) + I(9) + J(10) + K(11) = 36, and 36 - 5 = 31.

Explanation

The series follows the rule where each term is obtained by multiplying the previous term by 3 and adding an increasing integer starting from 1:

2 × 3 + 1 = 7 7 × 3 + 2 = 23 23 × 3 + 3 = 72 72 × 3 + 4 = 220 220 × 3 + 5 = 665

Explanation

The series follows a pattern where the difference between consecutive terms increases by consecutive multiples of 13:

20 - 7 = 13 (13 × 1) 46 - 20 = 26 (13 × 2) 85 - 46 = 39 (13 × 3) 137 - 85 = 52 (13 × 4)

Following this pattern, the next difference is 13 × 5 = 65:

137 + 65 = 202

Verifying the remaining terms with differences of 78 (13 × 6) and 91 (13 × 7): 202 + 78 = 280 280 + 91 = 371

Explanation

Barun is Fiza's husband. Diva is Barun's sister, which means Diva is also the sister of Aman, as Aman and Barun are brothers. Since Eva is Diva's daughter, Eva is Aman's sister's daughter.

Explanation

X is married to Y, and M is Y's daughter, which makes M the daughter of X and Y. X is also N's mother, meaning N is a child of X and Y. Since M has no sisters, N must be male, making N the brother of M.

P is married to M, so M is P's wife, which makes N P's wife's brother. Since B is N's son, B is P's wife's brother's son.

Explanation

The given series follows a distinct numerical progression for both the first and second letters based on their positions in the alphabet:

First letters advance by 3: A (1) → D (4) → G (7) → J (10) → M (13).

Second letters advance by 4: D (4) → H (8) → L (12) → P (16) → T (20).

Combining these two pattern steps gives the next term MT.

Explanation

Statement 2 states that "All fit are healthy". According to the rules of conversion for universal affirmative statements (All A are B), a universal affirmative proposition converts validly into a particular affirmative proposition (Some B are A). Therefore, "All fit are healthy" directly implies that "Some healthy are fit", making Conclusion 3 logically true.

Explanation

The given statement states only that human beings and apes share certain common characteristics. It does not provide any information regarding the intelligence levels of either humans or apes, nor does it establish any comparison between them. Consequently, neither of the conclusions about relative intelligence can be inferred from the statement.

Explanation

R lives on an even floor other than 4, so R lives on floor 6. Since 1 person lives between R and M, M lives on floor 4. The trio O, P, and Q occupy three consecutive floors in that order from top to bottom, placing them on floors 3, 2, and 1 respectively. For more than 3 persons to live between Q (floor 1) and L, L must live on floor 7. The remaining floor 5 is occupied by N.

The arrangement from top to bottom (floors 7 to 1) is L, R, N, M, O, P, Q. Since N lives on floor 5, there are 4 people living below N on floors 1 through 4.

Explanation

A projector is an optical device used for displaying visual media such as images and videos onto a screen, whereas all the other terms are audio devices used for capturing, amplifying, and producing sound.

Explanation

Since all members are contained within the set of candidates, and no candidate is a student, the set of members and the set of students have no overlap. Consequently, no member can be a student, which directly validates Conclusion 1, while Conclusion 2 contradicts this relationship.

Explanation

The general pattern followed in the set of numbers is (first number + 1)² = second number. For 3, 25, applying this pattern gives (3 + 1)² = 16, which is not equal to 25.

Explanation

The second number is obtained by dividing the first number by 2 and multiplying the result by 5 (or multiplying the first number directly by 2.5).

(18 ÷ 2) × 5 = 9 × 5 = 45

Applying the same logic to 34:

(34 ÷ 2) × 5 = 17 × 5 = 85

Explanation

The positional values of the letters in MKF are M = 13, K = 11, and F = 6. The difference between consecutive letters in this cluster is -2 and -5 (13 - 11 = 2 and 11 - 6 = 5), whereas the pattern followed by the other clusters is a decrease of 2 followed by a decrease of 4 (-2, -4).

Explanation

Based on the given conditions, the seven positions from 1 to 7 (left to right) are determined step-by-step:

Since C faces South and has 2 people to his left, C is placed at position 5. With 2 people sitting between C and A, A is at position 2. H is neither an immediate neighbour of C nor A, so H must be at position 7. F is third to the right of H, which means H faces North and F is at position 4. Since more than 3 people sit between H and B, B is placed at position 1. D is to the immediate right of A, so A faces North and D is at position 3. The remaining spot, position 6, is occupied by E.

The immediate neighbours of C face the direction opposite to C (South), meaning E at position 6 faces North. Facing North at position 6, E has C (at position 5) sitting to his immediate left.

Explanation

The coding rule consists of two steps: advance each letter by one position in the alphabetical series (+1), and then reverse the entire sequence of resulting letters.

Applying this pattern to "Resham": R → S, E → F, S → T, H → I, A → B, M → N Reversing "SFTIBN" yields "Nbifts".

Applying the same pattern to "Sashank": S → T, A → B, S → T, H → I, A → B, N → O, K → L Reversing "TBTIBOL" yields "Lobitbt".

Explanation

The series follows a pattern based on positional values in the English alphabet.

The first letter of each cluster increases by +2 across the series: A (1), C (3), E (5), G (7).

Within each cluster, each subsequent letter increases by +3: First letter: E (5) Second letter: 5 + 3 = 8 (H) Third letter: 8 + 3 = 11 (K) Fourth letter: 11 + 3 = 14 (N)

Explanation

The given series follows three independent patterns for its components:

The first number increases by 3: 3, 6, 9, 12, 15, 18. The letter moves forward by 1 in alphabetical order: d, e, f, g, h, i. The second number decreases by 2: 16, 14, 12, 10, 8, 6.

Combining these three results yields 18i6.

Explanation

In the given sequence 9466495947891649649, there are five occurrences of the digit 4:

The first 4 in "946" is preceded by 9 and followed by 6 (valid). The second 4 in "649" is preceded by 6 and followed by 9 (invalid). The third 4 in "947" is preceded by 9 and followed by 7 (valid). The fourth 4 in "649" is preceded by 6 and followed by 9 (invalid). The fifth 4 in "649" is preceded by 6 and followed by 9 (invalid).

Exactly two occurrences meet both criteria.

Explanation

The given series follows three independent patterns for the first number, the middle letter, and the last number:

First number: The difference increases by 5 each time. 3 + 5 = 8 8 + 10 = 18 18 + 15 = 33 33 + 20 = 53 53 + 25 = 78

Middle letter: Each letter moves forward by 6 positions in alphabetical order. A + 6 = G G + 6 = M M + 6 = S S + 6 = Y Y + 6 = E

Last number: The difference increases by 2 each time (consecutive odd numbers starting from 5). 2 + 5 = 7 7 + 7 = 14 14 + 9 = 23 23 + 11 = 34 34 + 13 = 47

Combining these three parts gives 78E47.

Explanation

In the given coding pattern, each letter is shifted backwards by 4 positions in the alphabetical order (W - 4 = S, I - 4 = E, R - 4 = N, E - 4 = A). Applying the same -4 shift to each letter of REPORT gives: R - 4 = N, E - 4 = A, P - 4 = L, O - 4 = K, R - 4 = N, and T - 4 = P, resulting in NALKNP.

Explanation

The series follows an alternating pattern of adding and subtracting decreasing multiples of 11 (+88, -77, +66, -55):

541 + 88 = 629 629 - 77 = 552 552 + 66 = 618 618 - 55 = 563

Explanation

Statement c establishes that "No colour is black and white", which is a universal negative statement. Universal negative statements can be converted directly into another universal negative statement by interchanging the subject and predicate terms. Applying this simple conversion to "No colour is black and white" directly yields "No black and white is colour", which makes conclusion iii logically valid.

Explanation

Flute is a musical instrument that belongs to the wind category, as it produces sound through the vibration of a column of air. Similarly, Guitar belongs to the string category, as sound is produced through the vibration of stretched strings.

Explanation

Radha offers an absurd and physically impossible reward ("buy you the moon") in exchange for solving the puzzle. Making such an extreme conditional promise implies Radha's underlying belief that the condition will not be fulfilled—that Mowgli will not be able to solve the puzzle. Therefore, the assumption regarding Mowgli's inability to solve the puzzle is implicit in her statement.

Explanation

The positional values of the letters in the English alphabet follow a decreasing pattern of 3:

Z (26) - 3 = W (23) W (23) - 3 = T (20) T (20) - 3 = Q (17) Q (17) - 3 = N (14) N (14) - 3 = K (11)

Subtracting 3 from the positional value of N (14) gives 11, which corresponds to the letter K.

Explanation

A microscope is an optical instrument used to magnify small, close-up objects, whereas a telescope is used to observe distant objects. Similarly, a magnifying glass is a simple optical device used to magnify small, nearby objects, while binoculars are used to observe distant objects.

Explanation

The pattern in the series is based on the differences between consecutive terms:

10 - 4 = 6 22 - 10 = 12 40 - 22 = 18 64 - 40 = 24

The differences increase by 6 at each step (6, 12, 18, 24, ...). The next difference in the pattern is 24 + 6 = 30.

Adding 30 to the last term gives 64 + 30 = 94.

Explanation

Monsoon represents an entire climatic season and large-scale seasonal wind pattern lasting several months, whereas the others are short-term atmospheric phenomena that occur during individual weather events.

Explanation

Each letter in the given word is shifted backwards in alphabetical order by -2, -3, -4, and -5 respectively:

PITA: P - 2 = N I - 3 = F T - 4 = P A - 5 = V

FIST: F - 2 = D I - 3 = F S - 4 = O T - 5 = O

Applying the same pattern to TURK: T - 2 = R U - 3 = R R - 4 = N K - 5 = F

This gives the coded word RRNF.

Explanation

Placing the eight persons around the circle facing the centre in clockwise order (left direction):

Position G at position 1. Since A sits second to the left of G, A is at position 3. Only two persons sit between A and B, placing B at position 8. F is a neighbour of G, taking position 2 since position 8 is already occupied by B. B sits third to the left of D, which places D at position 5. E sits second to the left of H, with B not being a neighbour of H. This places H at position 4 and E at position 6. C occupies the remaining position 7, which makes C a neighbour of B.

The complete clockwise arrangement from position 1 to 8 is: G, F, A, H, D, E, C, B.

Moving counter-clockwise (to the right) from F at position 2: 1st right is G (1), 2nd right is B (8), and 3rd right is C (7). Thus, C is third to the right of F.

Explanation

Emmet's maternal aunt is his mother's sister. Since this maternal aunt has only one sibling, that sibling is Emmet's mother. The daughter of Emmet's mother is Emmet's sister.

The only child of Ferdinand's father is Ferdinand himself.

When Emmet's sister married Ferdinand, Ferdinand became married to Emmet's sister. Therefore, Emmet is Ferdinand's wife's brother.

Explanation

X's mother-in-law's husband Veer is X's father-in-law. Veer has an only son, Sujal, and an only daughter, Wimra. Since Sujal is married to Kashish, X must be married to Veer's daughter, Wimra. Therefore, X is the husband of Wimra.

Explanation

The word "though" is used to introduce a contrast with a general expectation or belief. Stating "Though he is a Korean, this food is too spicy for my friend" implies a baseline expectation that Koreans are generally able to eat and tolerate spicy food. Thus, Assumption B is directly implicit in the reasoning behind the statement.

Explanation

The set of numbers 23, 29, and 31 consists entirely of prime numbers. The number 27 is a composite number since it is divisible by 3 and 9, making it not similar to the prime numbers in the given set.

Explanation

The series follows an alternating pattern of multiplying by consecutive even numbers and subtracting 2:

5 × 2 = 10 10 - 2 = 8 8 × 4 = 32 32 - 2 = 30 30 × 6 = 180 180 - 2 = 178

Explanation

This coding scheme uses direct letter-to-number substitution:

In HAND = 7194, H = 7, A = 1, N = 9, and D = 4. In LEG = 536, L = 5, E = 3, and G = 6.

Extracting the digits for the letters in LEAD gives L = 5, E = 3, A = 1, and D = 4. Putting them together in order gives 5314.

Explanation

In an aircraft, the compartment where passengers sit during travel is called a cabin. Similarly, the compartment or unit of a train designed for passengers to sit or travel in is called a coach.

Explanation

175 is an odd number, as it is not divisible by 2. In contrast, all other numbers in the set are even numbers divisible by 2, making 175 the odd one out.

Explanation

The number of employees having only laptops is obtained by subtracting the number of employees having both devices from the total number of employees having laptops.

Employees with only laptops = Employees with laptops - Employees with both laptops and desktops = 100 - 60 = 40

Explanation

By treating East-West movements along the x-axis (East as positive) and North-South movements along the y-axis (North as positive):

Net East-West displacement = +500 - 50 - 50 = +400 m (400 m East)

Net North-South displacement = -200 + 50 + 150 = 0 m

The total distance from the starting point is √(400² + 0²) = 400 m, directed due East.

Explanation

An advertisement is a document or medium used to present and promote the features, details, and qualities of a product to potential buyers. Similarly, a resume is a document used by a professional to present and promote their skills, qualifications, and work experience to potential employers.

Explanation

Combining two particular affirmative statements—"Some doors are rocks" and "Some rocks are woods"—yields no definite relation between the outer terms, doors and woods. Therefore, conclusion A does not logically follow.

Conclusion B states that "No wood is a rock", which directly contradicts the given statement that "Some rocks are woods". Since a negative proposition cannot follow from an affirmative premise, conclusion B does not follow.

Explanation

The pattern adds +2, +3, and +4 to the numerical positions of the first, second, and third letters respectively in the alphabetical order.

For ROD to TRH: R (18) + 2 = 20 (T) O (15) + 3 = 18 (R) D (4) + 4 = 8 (H)

For VET to XHX: V (22) + 2 = 24 (X) E (5) + 3 = 8 (H) T (20) + 4 = 24 (X)

Applying the same logic to SAP: S (19) + 2 = 21 (U) A (1) + 3 = 4 (D) P (16) + 4 = 20 (T)

Explanation

Arranging the given age relationships in order from oldest to youngest:

Nisha is younger than Nitu but older than Sumit: Nitu > Nisha > Sumit Niu is older than Sumit: Niu > Sumit Rohit is younger than Sumit but older than Kavita: Sumit > Rohit > Kavita

Combining these inequalities gives: (Nitu, Niu) > Nisha > Sumit > Rohit > Kavita

Explanation

The nose is a complex sensory and respiratory organ composed of multiple tissue types, including cartilage, skin, and mucosal membranes. In contrast, bone, tendon, and ligament are all specialized forms of connective tissue that perform structural and mechanical functions within the musculoskeletal system, making an organ the distinct odd one out among fundamental biological tissues.

Explanation

Statement 2 asserts that "Some expensive are villas", which is a particular affirmative proposition (I-type statement). By the law of conversion for I-type propositions, "Some A are B" directly converts to "Some B are A". Therefore, "Some expensive are villas" logically converts to "Some villas are expensive", making Conclusion 1 definitely valid.