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

Explanation

Using Cartesian coordinates with the starting point at (0, 0):

Walking 100 steps North moves him to (0, 100). Turning left (West) and walking 30 steps moves him to (-30, 100). Turning right (North) and walking 40 steps moves him to (-30, 140). Turning right (East) and walking 40 steps moves him to (10, 140). Turning right (South) and walking 140 steps moves him to (10, 0).

Comparing the final position (10, 0) with the origin (0, 0), Karan is 10 steps away in the East direction.

Explanation

Since the three search groups operate simultaneously, the total time required for the entire search operation is determined by the group taking the longest time.

Group 1 (1st and 2nd floors): Takes 1 min to reach the 1st floor, 20 min to search 20 rooms, 1 min to move to the 2nd floor, and 20 min to search 20 rooms. Total time = 1 + 20 + 1 + 20 = 42 min.

Group 2 (3rd and 4th floors): Takes 3 min to reach the 3rd floor, 20 min to search 20 rooms, 1 min to move to the 4th floor, and 20 min to search 20 rooms. Total time = 3 + 20 + 1 + 20 = 44 min.

Group 3 (5th and 6th floors): Takes 5 min to reach the 5th floor, 20 min to search 20 rooms, 1 min to move to the 6th floor, and 20 min to search 20 rooms. Total time = 5 + 20 + 1 + 20 = 46 min.

The maximum time taken among the three groups is 46 minutes.

Explanation

The pattern follows a sequential subtraction of increasing integers from the positional values of letters in the English alphabet: -1, -2, -3, -4, -5, -6, -7, and so on.

Applying this logic to KASHMIR: K (11) - 1 = 10 (J) A (1) - 2 = 25 (Y) S (19) - 3 = 16 (P) H (8) - 4 = 4 (D) M (13) - 5 = 8 (H) I (9) - 6 = 3 (C) R (18) - 7 = 11 (K)

Thus, KASHMIR is coded as JYPDHCK.

Explanation

The teacher prefers cold drinks along with A and B, which rules out A and B from being the teacher. Since D prefers coffee, D cannot be the teacher who prefers cold drinks. Further, the teacher is the brother of C, which rules out C as the teacher. Eliminating A, B, C, and D leaves E as the teacher.

Explanation

In the English alphabet, opposite letter pairs have positional values that sum to 27. The positional value of K is 11 and Q is 17, giving a sum of 28 (11 + 17 = 28). Since the correct opposite letter for K is P (11 + 16 = 27), KQ does not form a pair of opposite letters, making it the odd one out.

Explanation

Ankle and knee are major joints of the lower limb, where the knee is the joint located directly above the ankle. Similarly, wrist and elbow are major joints of the upper limb, where the elbow is the joint located directly above the wrist.

Explanation

The series alternates between two sub-series at odd and even positions.

Looking at the even-positioned terms: WVX: W(23) → V(22) → X(24) SRT: S(19) → R(18) → T(20)

The first letters of the even terms decrease by 4 in positional value: W(23) → S(19) → O(15).

Within each even term, the pattern is: first letter - 1 = second letter, and second letter + 2 = third letter.

Applying this pattern starting with O(15): First letter = O Second letter = 15 - 1 = 14 (N) Third letter = 14 + 2 = 16 (P)

This yields the cluster ONP.

Explanation

Combining Statement 1 (All cats are humans) and Statement 3 (All humans are trees) yields the intermediate logical conclusion that all cats are trees. Combining this result with Statement 2 (All trees are mice) establishes the complete inclusion chain: Cats ⊆ Humans ⊆ Trees ⊆ Mice. By transitivity, it logically follows that all cats are mice.

Explanation

In the standard English alphabet, the letter R occupies the 18th position from the left.

When the alphabet is written in reverse order (from Z to A), moving to the right corresponds to moving towards A, which means moving backward in standard alphabet positions.

The tenth letter to the right of R is at position 18 - 10 = 8. The 8th letter of the standard English alphabet is H.

Explanation

The letters are interchanged in pairs separated by two positions: A(1) swaps with C(3), B(2) with D(4), E(5) with G(7), F(6) with H(8), and so on.

Following this pattern, R(18) interchanges with T(20), putting T at position 18 in the new sequence.

The 7th letter to the left of position 18 is at position 18 - 7 = 11.

Since I(9) interchanges with K(11), the letter placed at position 11 in the new arrangement is I.

Explanation

Conclusion (i) follows because statement (i) mentions clothes sold at the boutique and statement (iii) specifies that accessories like bags and makeup are also sold. Conclusion (ii) follows because all clothes sold in the boutique are of high standard, and Cara and Cucci are the only brands sold there. Conclusion (iii) directly follows from statement (iii), which explicitly states that Cucci accessories are sold at the boutique.

Explanation

The numbers in each pair follow the relation n² : n³, where n is a natural number.

First pair: 36 = 6² and 216 = 6³ Second pair: 100 = 10² and 1000 = 10³ Third pair: 25 = 5², so the required number is 5³ = 125

Explanation

Ansari is the paternal grandfather of Abdul, which makes Ansari the father of Abdul's father, Aziz. Since Aziz is the only son of his parents, Ansari has no other sons. Therefore, Ansari's daughter-in-law Sarah must be married to his only son Aziz, making Sarah the wife of Aziz.

Explanation

Argument 1 is weak because justifying unethical behavior based on the actions of others is illogical and undermines discipline and fair practice. Argument 2 is strong because it directly addresses the fundamental purpose of examinations, which is to assess a student's genuine knowledge, ability, and potential accurately and fairly. Punishing cheating is necessary to maintain the integrity, credibility, and fairness of the evaluation process.

Explanation

Each letter in the code is obtained by taking its opposite letter in reverse alphabetical order and shifting back by 1 position, which follows the formula C = 26 - P, where P is the alphabetical position of the original letter and C is the position of the coded letter.

The fifth letter from the left in HEYER is R. Since R is the 18th letter of the alphabet, applying the rule gives C = 26 - 18 = 8, which corresponds to the letter H.

Explanation

Long Gauge is not a recognized standard classification of railway track gauge. Railway track gauges are internationally categorized based on the distance between the inner faces of the two parallel rails, with standard classifications being broad gauge, meter gauge, narrow gauge, and standard gauge. "Long Gauge" does not exist as an official term or gauge specification in railway system engineering.

Explanation

CRPF (Central Reserve Police Force) is a Central Armed Police Force under the Ministry of Home Affairs responsible for internal security, whereas NTPC, SAIL, and BHEL are all Indian Public Sector Undertakings (PSUs) with Maharatna status engaged in commercial and industrial activities.

Explanation

The differences between consecutive terms follow a sequence of consecutive multiples of 3:

5 - 2 = 3 11 - 5 = 6 20 - 11 = 9 32 - 20 = 12 47 - 32 = 15 65 - 47 = 18

Adding the next multiple of 3, which is 21, to the last term gives 65 + 21 = 86.

Explanation

The ICC World Cup is a single-sport tournament dedicated exclusively to cricket, whereas the other events are multi-sport competitions that host contests across a wide range of different athletic disciplines.

Explanation

Each letter in the given word is replaced by the letter that is two positions behind it in the English alphabetical order (-2 pattern):

F - 2 = D L - 2 = J O - 2 = M W - 2 = U

Applying the same rule to WING:

W - 2 = U I - 2 = G N - 2 = L G - 2 = E

Explanation

In dictionary arrangement, words are ordered alphabetically letter by letter. Accent begins with the prefix A-c-c, which comes after prefixes A-b-o, A-b-u, and A-c-a. Since 'c' comes after 'b' in the second position and 'c' comes after 'a' in the third position, Accent appears at the end of the alphabetical sequence.

Explanation

The ankle is the joint that connects the leg to the feet, located immediately above the feet. Similarly, the wrist is the joint that connects the arm to the palm, located immediately above the palm. Both pairs represent a joint and the body part connected directly below it.

Explanation

Fly is the primary action associated with using a kite. Similarly, roll is the primary action associated with throwing or playing with a dice.

Explanation

Statement 3 asserts that not all baskets are bangles, which means there exist certain baskets that are not bangles. Since Statement 1 establishes that all bats are bangles, any item that is not a bangle can never be a bat. Consequently, those baskets that are not bangles are also logically not bats, directly confirming that some baskets are neither bangles nor bats.

Explanation

X is the mother-in-law of Z, which means X is the mother of Z's husband. Since N is given as the husband of Z, N must be the son of X.

Explanation

In the standard pattern, the 1st and 3rd letters, as well as the 2nd and 4th letters, are opposite pairs in the English alphabet whose positional values sum to 27. In OPML, the positional values of the 1st and 3rd letters (O = 15, M = 13) sum to 28, and the 2nd and 4th letters (P = 16, L = 12) sum to 28, failing to form opposite letter pairs.

Explanation

Toss represents a preliminary procedure or decision-making action performed before a game, whereas the other terms represent the final results or outcomes of a match.

Explanation

Course of Action I is a practical and direct solution to the problem stated. A primary cause of road accidents is non-compliance with traffic regulations and a lack of road safety awareness. Implementing government awareness programmes encourages responsible driving behavior, reinforces strict adherence to traffic rules, and actively reduces the risk of collisions on the road.

Explanation

The logic followed in the grid operates row-wise. For each row, the number in the first column is calculated by adding the numbers in the second and third columns, and then subtracting an even number that increases by 2 in each row (0, 2, and 4 respectively).

Row 1: (5 + 1) - 0 = 6 Row 2: (9 + 7) - 2 = 14 Row 3: (8 + 12) - 4 = 16

Explanation

Using a coordinate system with Roopa's office at the origin (0, 0), her movements to reach her friend's house are traced as follows:

Walking 20 metres North brings her to (0, 20). Walking 50 metres East brings her to (50, 20). Walking 25 metres North brings her to (50, 45). Walking 50 metres West brings her to (0, 45), which is her friend's house.

The friend's house is at position (0, 45) and her office is at (0, 0). The straight-line distance between them is 45 metres, and moving from the friend's house towards the office is a direction directly towards the South.

Explanation

Each letter in the word is shifted forward by 3 positions in the English alphabetical series:

D (+3) → G, E (+3) → H, N (+3) → Q M (+3) → P, E (+3) → H, N (+3) → Q

Applying the same rule to 'BOX': B (+3) → E O (+3) → R X (+3) → A (wrapping around the alphabet after Z)

Explanation

Break down the relationship statement step by step:

"My eldest daughter's maternal aunt" refers to the lady's sister, as a maternal aunt is the mother's sister. "Maternal aunt's youngest sister" refers to the lady herself or one of her sisters. "The father of..." means the father of the lady's sister or of the lady herself.

Since the father of a woman's sister is also her own father, you are the lady's father.

Explanation

Statement III establishes that every beverage sold at the cafeteria is very aromatic and tasty. Since any coffee sold at this cafeteria is a beverage sold there, it must be very aromatic, so conclusion (i) logically follows. Conclusion (ii) introduces espressos and cappuccinos, which are not mentioned in any statement. Statement II specifies that no tea is sold at the cafeteria, so no information is provided about the properties of tea, making conclusion (iii) invalid. Thus, only conclusion (i) logically follows from the statements.

Explanation

The rectangle function operates on two numbers a and b such that the result is given by multiplying the two numbers, adding 1, and dividing the sum by the first number a.

Applying this operation to the given examples: 4 5 = (4 × 5 + 1) / 4 = 21 / 4 3 6 = (3 × 6 + 1) / 3 = 19 / 3 6 5 = (6 × 5 + 1) / 6 = 31 / 6

Therefore, for general inputs a and b: a b = (ab + 1) / a

Explanation

The calculation logic applied across all equations is: Result = (First number × Second number) / 2 + 1

Applying this pattern to the given equations: Equation I: (4 × 5) / 2 + 1 = 10 + 1 = 11 Equation II: (4 × 8) / 2 + 1 = 16 + 1 = 17 Equation III: (2 × 9) / 2 + 1 = 9 + 1 = 10

Following the same pattern for Equation IV: (6 × 3) / 2 + 1 = 9 + 1 = 10

Explanation

Spreading awareness about preventive measures helps residents protect themselves and halts further spread of the epidemic to nearby areas. Treating the contaminated pond directly eliminates the root cause of the outbreak. Conversely, mass relocation of the affected population to healthy regions is impractical and dangerous, as it risks transmitting the contagious disease to healthy populations. Thus, taking preventive communication measures and addressing the source of contamination are the logical courses of action.

Explanation

A pincode (Postal Index Number) is a numerical identification code used by the postal service to designate specific geographical areas and post offices to facilitate mail sorting and routing, making it an addressing parameter rather than a physical mail article meant for transmission and delivery.

Explanation

Looking at the odd-positioned terms, the first letters follow the pattern Z (26), X (24), V (22), decreasing by 2 each time. Each pair consists of letters that are opposite to each other in the alphabet (where the sum of their alphabetical positions equals 27). The letter opposite to V is E (27 - 22 = 5), forming the pair VE.

Explanation

A hanger is a household item used for hanging clothes, whereas the other items are hardware tools used for mechanical, construction, and repair work.

Explanation

Making moral education compulsory at the primary school level emphasizes the importance of character building during foundational years. Recommending a subject at the primary level does not imply that only young children are capable of learning morality, nor does it mean that older students have no need for moral education. Extreme terms and absolute claims regarding older children fall outside the scope of the speaker's statement, rendering both assumptions invalid.

Explanation

By comparing common letters in the given words and their corresponding digits: Comparing ABLE (3781) and HAIR (4365), common letter A = 3. Comparing ABLE (3781) and TOOL (9008), common letter L = 8. From TOOL (9008), T = 9. From HAIR (4365), R = 5. From ABLE (3781), E = 1.

Substituting these values into RATTEL gives R = 5, A = 3, T = 9, T = 9, E = 1, and L = 8, yielding 539918.

Explanation

The Euro was officially launched and adopted as a common European currency on January 1, 1999, by 11 member states of the European Union under the Maastricht Treaty. Initially introduced as a non-physical accounting currency for financial markets, banking, and electronic transfers, it replaced the European Currency Unit (ECU) at a 1:1 ratio. Physical euro banknotes and coins were subsequently introduced into general public circulation on January 1, 2002.

Explanation

Each letter is coded as its reverse alphabetical counterpart, where the sum of the positional values of the letter and its coded letter equals 27.

R (18) + I (9) = 27 A (1) + Z (26) = 27 T (20) + G (7) = 27 E (5) + V (22) = 27

Applying the same rule to FUND: F (6) → U (21) U (21) → F (6) N (14) → M (13) D (4) → W (23)

Explanation

The statement asserts that 18 years of age and above is appropriate for a girl's marriage. In logical reasoning, setting an age benchmark for marriage directly implies that reaching this age ensures an individual attains the requisite physical, biological, and psychological maturity necessary for marriage and motherhood. Therefore, conclusion 1 directly and logically follows from the statement.

Explanation

The four available positions are 1, 2, 3, and 4.

Since Radha and Neena are served one after the other, they must occupy adjacent positions. If Radha and Neena occupy positions (1, 2) or (3, 4), then Mohita and Jyoti are forced to occupy the remaining two adjacent positions, which violates the constraint that Mohita and Jyoti cannot be served one after the other. Therefore, Radha and Neena must occupy positions 2 and 3, placing Mohita and Jyoti in non-adjacent positions 1 and 4.

Since Neena cannot be served at position 3, Neena must be served at position 2. Consequently, Radha must be served at position 3.

The valid sequence is either Mohita, Neena, Radha, Jyoti or Jyoti, Neena, Radha, Mohita. In both valid sequences, Radha is served third.

Explanation

Replacing the letter symbols with their corresponding mathematical operations: P represents +, S represents -, M represents ×, and D represents ÷.

Substituting the operators into the given expression: 3 P 2 M 3 S 6 D 2 = 3 + 2 × 3 - 6 ÷ 2

Following the BODMAS rule (Division, Multiplication, Addition, Subtraction): Step 1 (Division): 6 ÷ 2 = 3 Step 2 (Multiplication): 2 × 3 = 6 Step 3 (Addition and Subtraction): 3 + 6 - 3 = 6

Explanation

Interchanging + with × and the number 3 with 2 in the equation gives:

4 × 6 ÷ 2 - 2 + 3

Following BODMAS order of operations: 4 × 6 ÷ 2 = 12 12 - 2 + 3 = 13

This simplifies to 13, matching the right-hand side of the equation.

Explanation

The code maps each letter of the target word to a specific position within four consecutive words. In the given example for BALL, B is the 2nd letter of OBEY, A is the 4th letter of COMA, L is the 1st letter of LORD, and L is the 3rd letter of GULF. Applying the same positional pattern of 2nd, 4th, 1st, and 3rd letters to KITE, K is the 2nd letter of SKY, I is the 4th letter of BRAIN, T is the 1st letter of TABLE, and E is the 3rd letter of GOES.

Explanation

The word "most" indicates a majority (more than 50%) but not the entire quantity (less than 100%). Stating that most of the wrist watches in the shop are expensive logically implies that a minority of the wrist watches in the shop are not expensive, meaning there are also cheap wrist watches present in the shop.

Explanation

Combining statement 1 (Some students are dancers) and statement 2 (All dancers are musicians) using standard syllogism rules (I + A = I) yields the conclusion "Some students are musicians", so conclusion 1 logically follows. Meanwhile, statement 1 directly establishes that an overlap exists between students and dancers, which makes conclusion 2 false. Thus, only conclusion 1 follows.