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

Explanation

W3 lives in hotel S and W6 lives in hotel W, leaving hotels P, Q, R, and T for W1, W2, W4, and W5.

Since W1, W4, and W5 cannot live in hotel R, W2 must live in hotel R.

With hotel R assigned to W2, the remaining hotels are P, Q, and T for W1, W4, and W5. Since neither W4 nor W5 can live in hotel P, W1 must live in hotel P.

Explanation

Kilogram is the SI unit used to measure mass. Similarly, kilometre is a unit used to measure length.

Explanation

Break down the statement step by step from Sachit's perspective: "My father's only daughter" refers to Sachit's sister. The "brother of my father's only daughter" refers to Sachit himself. The woman who "gave birth to" him is Sachit's mother. The "husband of the woman" is Sachit's mother's husband, which is Sachit's father.

Since Sachit is the male child of this man, Sachit is his son.

Explanation

The Prime Meridian is a line of longitude (0° longitude) running north-south from the North Pole to the South Pole, dividing the Earth into the Eastern and Western Hemispheres. It is a meridian of longitude, whereas the other items are parallels of latitude that run east-west around the globe.

Explanation

The differences between consecutive terms follow the sequence of factorials:

5 - 4 = 1 = 1! 7 - 5 = 2 = 2! 13 - 7 = 6 = 3! 37 - 13 = 24 = 4!

The next difference to add is 5! = 120.

Adding this to the last term: 37 + 120 = 157.

Explanation

Raj's maternal uncle is his mother's brother. Since the maternal uncle has only one sister, that sister is Raj's mother. Therefore, the father of the only sister of Raj's maternal uncle is Raj's mother's father.

Explanation

The series follows a consistent pattern across all four components:

The first letter increases by 1 position in alphabetical order: C (+1) → D (+1) → E (+1) → F. The first number increases by 1: 1 (+1) → 2 (+1) → 3 (+1) → 4. The second letter increases by 2 positions in alphabetical order: D (+2) → F (+2) → H (+2) → J. The second number increases by 2: 3 (+2) → 5 (+2) → 7 (+2) → 9.

Combining the missing positions yields E3H7.

Explanation

The ostrich is a flightless bird that belongs to the ratite family and is incapable of flight. It differs from flying raptors (birds of prey) that use their wings for flight and hunting.

Explanation

The word is divided into two halves of three letters each, and the order of letters in both halves is reversed.

DEFECT is split into DEF and ECT. Reversing DEF gives FED, and reversing ECT gives TCE, forming FEDTCE.

Applying the same rule to DEARTH: First half DEA reversed gives AED. Second half RTH reversed gives HTR.

Combining both halves gives AEDHTR.

Explanation

The arrangement of the seven houses from left to right (positions 1 to 7) is determined as follows: D is at the extreme right (position 7). Since B has two immediate neighbours A and F, B cannot be at an extreme end. H is fourth to the right of B (position of H = position of B + 4). Since position 7 is occupied by D, B must be at position 2, placing H at position 6. A and F occupy positions 1 and 3 around B. E is built immediately next to A, so A must be at position 3 to allow E at position 4, leaving F at position 1. C occupies the remaining position 5.

The final arrangement from left to right is: F (1), B (2), A (3), E (4), C (5), H (6), D (7).

In BE, the first house B (position 2) is located two places to the left of the second house E (position 4), whereas in the other combinations, the first house is located two places to the right of the second house.

Explanation

To determine who plays chess, arrange the five members in decreasing order of height:

A is shorter than only two members, so A is in the 3rd position (_ > _ > A > _ > _).

B is taller than E but shorter than D, giving the relation D > B > E. Since E is not the shortest, E must occupy the 4th position, which places D at the 1st position and B at the 2nd position, leaving C in the 5th position.

The complete height order from tallest to shortest is D > B > A > E > C.

Since the tallest member plays chess, D is the tallest member and therefore plays chess.

Explanation

The given series follows the pattern of cubes of consecutive non-negative integers n³ for n = 0, 1, 2, 3, 4...:

0³ = 0 1³ = 1 2³ = 8 3³ = 27 4³ = 64

Explanation

From Statement 2, some men are doctors, meaning there is a non-empty overlap between men and doctors. Since Statement 1 asserts that all doctors are good, any person who is a doctor is automatically good. Consequently, those men who are doctors must also be good, which directly validates Conclusion II ("Some men are good"). Conclusion I does not follow because knowing that some men are doctors does not imply that all doctors are men.

Explanation

Positioning the six boys around the table in clockwise order (positions 1 to 6) facing the centre:

Let B4 be at position 1. Since B1 sits second to the right of B4, B1 is at position 5.

B6 is a neighbour of B4, placing B6 at position 2 or 6. Since B3 sits third to the left of B6, B3 must sit directly opposite B6. If B6 were at position 2, B3 would be at position 5, which is already occupied by B1. Thus, B6 is at position 6 and B3 is at position 3.

Since B2 is not a neighbour of B1 (position 5), B2 cannot be at position 4. Therefore, B2 sits at position 2, and B5 takes the remaining position 4.

The clockwise sequence is B4 (1), B2 (2), B3 (3), B5 (4), B1 (5), and B6 (6).

Counting two positions clockwise (to the left) from B2 at position 2 leads directly to B5 at position 4.

Explanation

The difference between consecutive terms follows the sequence of consecutive odd numbers starting from 3:

14 - 11 = 3 19 - 14 = 5 26 - 19 = 7

Adding the next odd number, 9, to 26 gives:

26 + 9 = 35

Verifying with the final term by adding the next odd number, 11:

35 + 11 = 46

Explanation

Cargo refers to the goods, freight, or merchandise being transported, rather than a mode or medium of transportation. It represents the actual item being moved rather than the system, route, or means used to transport it.

Explanation

The pattern in the series is as follows:

The first letter decreases by 2 positions in the alphabetical order: K (11), I (9), G (7), E (5).

The middle number decreases by 9 in each step: 33, 24, 15, 06.

The last letter increases by 2 positions in the alphabetical order: K (11), M (13), O (15), Q (17).

Combining these components gives E06Q.

Explanation

Since all dogs are contained within the set of pets and no pet is a tiger, there can be no overlap between dogs and tigers. Therefore, no dog is a tiger, making Conclusion II logically valid.

Conclusion I states that all pets are dogs, which is an invalid conversion; knowing that all dogs are pets only implies that some pets are dogs, not all. Thus, only Conclusion II logically follows.

Explanation

The selection of D, P, R, C, and Q satisfies every given constraint. It forms a 5-member team where none of A, E, or F are chosen, obeying the group requirement for A, E, and F. Since B is not selected, the condition restricting Q and D is not triggered. C is selected without E or F, satisfying the restriction on C. Additionally, B and T are not both present, which adheres to the rule that only one of B or T can be selected.

Explanation

The code is formed by applying the sequence +0, +1, -2, +3, -4, +5, -6 to the alphabetical positions of consecutive letters:

1st letter: S + 0 = S 2nd letter: P + 1 = Q 3rd letter: R - 2 = P 4th letter: I + 3 = L 5th letter: N - 4 = J 6th letter: G + 5 = L 7th letter: S - 6 = M

Applying this logic yields SQPLJLM.

Explanation

A barber works on hair as the primary material or subject of their profession. Similarly, a tailor works on cloth as the fundamental material of their trade.

Explanation

A kiln is a specialized oven or furnace used for baking or firing bricks during their manufacturing process. Similarly, a mint is the industrial facility where coins are manufactured and produced under legal authority.

Explanation

The series follows a dual-letter positional addition pattern:

First letters increase by 5 in alphabetical order: L (12) + 5 = Q (17) Q (17) + 5 = V (22) V (22) + 5 = 27 ≡ A (1)

Second letters increase by 6 in alphabetical order: S (19) + 6 = Y (25) Y (25) + 6 = 31 ≡ E (5) E (5) + 6 = K (11)

Combining the two gives AK.

Explanation

Break down the relation step-by-step from the man's perspective:

The man's paternal grandfather's only son is the man's father. The sister of the man's father is the man's paternal aunt. The only child of the man's paternal aunt is the person in the photograph.

To find how the man is related to the person in the photograph, view the relation from the photograph's subject: her mother is the man's paternal aunt, her mother's brother is the man's father, and the man is her mother's brother's son.

Explanation

The pattern in each row follows the relation: (First Number + Third Number) - Middle Number = Result

Row 1: (3 + 11) - 18 = -4 Row 2: (12 + 18) - 24 = 6

The row results (-4, 6) follow a sequence where the difference increases by 2. The difference between -4 and 6 is 10, so the next difference is 10 + 2 = 12, making the result for Row 3 equal to 6 + 12 = 18.

Row 3: (? + 14) - 12 = 18 ? + 2 = 18 ? = 16

Explanation

Code 1 replaces each letter of a word with its reverse alphabet letter, where the sum of the positional values of the original letter and its corresponding coded letter equals 27.

Applying this rule to JUNCTION gives: J (10) → Q (17) U (21) → F (6) N (14) → M (13) C (3) → X (24) T (20) → G (7) I (9) → R (18) O (15) → L (12) N (14) → M (13)

Using the exact same opposite-letter logic for CUSTOMER: C (3) → X (24) U (21) → F (6) S (19) → H (8) T (20) → G (7) O (15) → L (12) M (13) → N (14) E (5) → V (22) R (18) → I (9)

This produces XFHGLNVI, showing that Code 1 was used.

Explanation

Movie is the overarching category or medium of film entertainment, whereas the other three words are specific genres used to categorize movies based on their theme and content.

Explanation

In the word REMEMBER, each letter is directly substituted with a specific digit based on its position in the code 12323421: R = 1, E = 2, M = 3, B = 4

Applying the same digit substitution to the word MEMBER: M = 3 E = 2 M = 3 B = 4 E = 2 R = 1

Combining these digits in order yields 323421.

Explanation

A stable is the designated dwelling place or shelter for a horse. Similarly, a rabbit lives in a burrow, which is a hole or tunnel excavated in the ground as its natural habitat and shelter.

Explanation

The differences between consecutive terms in the series follow an arithmetic progression increasing by 3:

7 - 4 = 3 13 - 7 = 6 22 - 13 = 9 34 - 22 = 12 49 - 34 = 15

Following this pattern, the next difference is 15 + 3 = 18. Adding 18 to the last term yields 49 + 18 = 67.

Explanation

The pattern in the alphanumeric series is determined by analyzing each element separately across the terms:

The first number increases by 5: 2 + 5 = 7, 7 + 5 = 12, 12 + 5 = 17, 17 + 5 = 22, 22 + 5 = 27.

The middle letter moves 5 positions backward in the alphabet: Y(25) − 5 = T(20), T(20) − 5 = O(15), O(15) − 5 = J(10), J(10) − 5 = E(5), E(5) − 5 = Z(26).

The second number decreases by 5: 28 − 5 = 23, 23 − 5 = 18, 18 − 5 = 13, 13 − 5 = 8, 8 − 5 = 3.

Combining these three components gives 17J13.

Explanation

A reduction in the production of mangoes leads to a decrease in their supply in the market. According to the basic economic principle of supply and demand, a decrease in the supply of a commodity while demand remains constant causes its price to increase. Therefore, the drop in mango production directly leads to the increase in market prices, making statement A the cause and statement B its effect.

Explanation

String is a component or part of a musical instrument used to generate sound, rather than being a complete, standalone musical instrument itself.

Explanation

The group PQSBCE consists of six members: P, Q, S, B, C, and E. It satisfies all specified conditions: B is included alongside C, fulfilling the requirement that B joins only with C. Since A is not in the group, the condition that A cannot join with E or Q is not violated. Finally, neither D nor R is present in the group, so the restriction against D joining with R is satisfied.

Explanation

From Statement 1, "Some chairs are tables", the immediate converse is "Some tables are chairs". Thus, conclusion 2 logically follows.

Regarding conclusion 1, all books are inside tables and chairs overlap with tables, but there is no mandatory relationship or overlap established between books and chairs. Therefore, conclusion 1 does not follow.

Explanation

Napoleon Bonaparte was a military commander and ruler historically associated with France, serving as its Emperor. Similarly, Christopher Columbus is historically associated with Spain because his transatlantic voyages of exploration were commissioned, funded, and supported by the Spanish monarchy, Queen Isabella I of Castile and King Ferdinand II of Aragon.

Explanation

The operation a ÷ b follows the pattern ½ × a × (b + 1):

For 6 ÷ 2: ½ × 6 × (2 + 1) = 3 × 3 = 9 For 4 ÷ 5: ½ × 4 × (5 + 1) = 2 × 6 = 12 For 7 ÷ 3: ½ × 7 × (3 + 1) = 3.5 × 4 = 14

Applying the same logic to 3 ÷ 3: ½ × 3 × (3 + 1) = 1.5 × 4 = 6

Explanation

The speaker's mother has only two children: one daughter (the elder sister) and one son, which means the speaker is male (the son). The man in the picture is the only son of the grandmother, but is not the mother's brother. This means the grandmother referenced is the paternal grandmother, whose only son is the speaker's father. Therefore, the man in the picture is the speaker's father, making the speaker his son.

Explanation

Based on the given statements, we can establish the relative ranking of teams by the number of matches won:

KKR won more matches than MI but less than CSK: CSK > KKR > MI

DD won more matches than RR and RCB, but less than MI: MI > DD > (RR, RCB)

Combining these inequalities into a single sequence from highest to lowest wins gives: CSK > KKR > MI > DD > (RR, RCB)

CSK occupies the highest position in the ordering with the maximum number of wins.

Explanation

The code language follows a pattern of dividing the string into groups of letters and applying a specific rotational shift and rearrangement to each group. Applying the identical transformation rule to the word WEFKFWKWFWK results in FKWKWFWFKFWK. Thus, option A is correct.

Explanation

The pattern shifts the first two letters of the eight-letter word to the very end while keeping the relative order of the remaining six letters unchanged.

In AMFMAFAA, shifting the first two letters AM to the end gives FMAFAA + AM = FMAFAAAM.

Applying the same rule to DODADODA, shifting the first two letters DO to the end gives DADODA + DO = DADODADO.

Explanation

Nikhil approaching Tabu with the intent to kill her (Event B) directly triggered Tabu to defend herself, which resulted in Nikhil being accidentally killed (Event A). Therefore, Event B serves as the immediate and principal cause that brought about the outcome in Event A, making Event A the effect.

Explanation

The given sequence consists of two alternating sub-series.

The terms at even positions double at each step: 6 × 2 = 12, 12 × 2 = 24, and 24 × 2 = 48.

The terms at odd positions follow the sequence of consecutive prime numbers: 3, 5, ?, 11, 13. The prime number that comes after 5 and before 11 is 7.

Explanation

Substituting the symbols into the expression according to the given instructions: '>' becomes '+' '<' becomes '-' '+' becomes '÷' '=' becomes '<'

The given equation transforms into: 7 + 7 - 7 ÷ 7 < 14

Applying the standard order of operations: 7 ÷ 7 = 1 7 + 7 - 1 = 13

Since 13 < 14 is a correct inequality, the equation holds true.

Explanation

The given series is composed of two alternating sub-series based on alphabetical positions:

The odd-positioned terms are C (3), E (5), and G (7), where each letter increases by 2.

The even-positioned terms are A (1), C (3), and the question mark. Following the same pattern of adding 2, the next positional value is 3 + 2 = 5, which corresponds to the letter E.

Explanation

Sohan and Radhika are siblings, making Shyam, who is Radhika's father, Sohan's father as well. Since Ram is the brother of Shyam, Ram is the brother of Sohan's father. By definition, a father's brother is the paternal uncle, making Ram the paternal uncle of Sohan.

Explanation

Substituting the decoded mathematical operators into 8 < 4 + 2 = 6 > 3 gives:

8 - 4 ÷ 2 < 6 + 3

Applying the BODMAS rule: LHS = 8 - (4 ÷ 2) = 8 - 2 = 6 RHS = 6 + 3 = 9

Since 6 < 9, the inequality holds true.

Explanation

A horse is the primary power source and driving force that provides the energy to move a cart. Similarly, an engine is the main power source that provides the driving force to propel a car.

Explanation

The statement asserts that no nation today is completely self-dependent, which means every nation relies on external trade or foreign resources for certain goods and services. This directly implies that a single country cannot grow and produce everything required to meet all of its domestic needs due to natural, technical, or resource constraints. Therefore, Conclusion II logically follows as an implicit reason behind a nation's lack of total self-reliance.

Explanation

Combining statement I (Some cups are plates) and statement II (All plates are trays) using standard syllogism rules yields: Some A are B + All B are C ⇒ Some A are C. Therefore, Some cups are trays logically follows.

Using Venn diagrams, all plates lie entirely within the boundary of trays. Since cups overlap with plates, the overlapping region of cups and plates is automatically contained within trays, guaranteeing that some cups are trays.