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

Explanation

Let M, N, K, and P represent the salaries of Meera, Namit, Kavita, and Punit respectively.

From the given conditions:

1. M + N > K + P
2. M + K = N + P
3. M = ½(N + P)

Substituting N + P = 2M from equation (3) into equation (2) gives M + K = 2M, which simplifies to K = M.

Substituting K = M into inequality (1) gives M + N > M + P, which simplifies to N > P.

Since M is the average of N and P, namely M = ½(N + P), and N > P, M lies strictly between P and N, meaning P < M < N.

Combining all relations gives P < M = K < N, which proves that Namit's salary is the highest.

Explanation

The given statements provide data only regarding the total income of the family and the income generated from the IT sector. The IT sector contributes 60% of the total income (2,40,000 / 4,00,000 × 100 = 60%), but this represents the proportion of earnings, not the proportion of family members, since individual salaries can vary. Additionally, the statements contain no information regarding the gender composition or the respective earnings of male and female members.

Explanation

Based on the given conditions, the seating arrangement from left to right (positions 1 to 5) is C, A, E, B, D.

D sits to the immediate right of B at position 5 (extreme right end), placing E at position 3. E prepares for C1 since E is to the immediate left of B, who prepares for C5. D prepares for C3 because one person sits between C1 and C3. A sits at position 2, as two persons sit between A and D (C3) and A cannot be adjacent to B. This leaves C at position 1. Since C does not prepare for C4, C is preparing for C2, while A prepares for C4.

Explanation

Dr. Mohanty meets criterion iii because his 8 years of teaching experience at the secondary level exceeds the required 3 years. He also satisfies criterion iv as he possesses fluency in both Hindi and English. He fails to satisfy criterion i because his graduation included only one subject (Geography) from the required list instead of two, and he fails criterion ii as he does not possess a B.Ed. degree. Therefore, he fulfills the eligibility requirements under criteria iii and iv.

Explanation

Since some guavas are mangos and all mangos are pears, the portion of guavas that are mangos must also lie within the set of pears. This makes Conclusion II ("Some guavas are pears") logically valid. There is no definite relation linking grapes with either guavas or mangos, as grapes are only stated to overlap with pears in general, so Conclusions I and III do not necessarily follow.

Explanation

Since D is the father of B, D is male. C and D are a married couple, which makes D the husband of C. D is also the brother of E, which means E is the brother of C's husband (husband's brother).

Explanation

Since Aayush is a soldier and every soldier possesses a rifle, it directly follows that Aayush has a rifle, making conclusion I valid. Statement 1 asserts that all soldiers have rifles, but it does not restrict rifle ownership exclusively to soldiers, so people other than soldiers may or may not possess rifles, making conclusion II logically invalid.

Explanation

Number of odd days = 91 mod 7 = 0. Since 91 is exactly divisible by 7 (91 = 13 × 7), 91 days consists of 13 complete weeks. Adding 0 odd days to Thursday results in Thursday.

Explanation

Under Entry 23 of the Union List in the Seventh Schedule of the Constitution of India, National Highways are under the exclusive domain of the Union. The Central Government, primarily through the Ministry of Road Transport and Highways and its operational body, the National Highways Authority of India (NHAI), is entrusted with the development, construction, and maintenance of the country's National Highway network.

Explanation

Number the six positions in the row from 1 to 6 from left to right (where moving right corresponds to facing east). Since M is third to the right of O, the position of M is given by O's position plus 3. Because neither O nor M sits at the extreme ends (positions 1 and 6), O must be at position 2 and M must be at position 5.

Since three persons sit between O and L, L must be at position 6. Given that N is a neighbour of M (position 5), N must occupy position 4 because position 6 is already occupied by L. This leaves positions 1 and 3 for the remaining two persons, D and E. Since O is at position 2, its immediate neighbours are at positions 1 and 3, which are occupied by D and E.

Explanation

Statement I pertains to a meteorological forecast predicting heavy rainfall during the monsoon season in northern India, whereas Statement II relates to an economic action by farmers withholding potato supplies from the market. Neither event acts as the cause or effect of the other, nor do they share an immediate common cause. Since both statements deal with entirely distinct domains—weather predictions and agricultural market supply dynamics—they are completely independent of each other.

Explanation

Argument 1 presents a crucial economic issue, as a complete ban on tobacco selling would lead to massive job losses among farmers, factory workers, and retailers involved in the tobacco sector. Argument 2 addresses a critical public health concern, highlighting that tobacco usage harms vulnerable populations like minors and causes severe long-term health consequences. Because both arguments raise realistic, significant, and directly relevant consequences regarding employment and public health, both arguments are strong.

Explanation

Replacing the mathematical signs according to the given instructions: × becomes ÷ becomes ×

• becomes - ÷ becomes +

Substituting these operators into the given expression: 208 ÷ 8 × 7 - 38 + 28

Applying the BODMAS rule: Division: 208 ÷ 8 = 26 Multiplication: 26 × 7 = 182 Addition and Subtraction: 182 - 38 + 28 = 172

Explanation

The coding system reorders the three digits in the expression A + B + C into the three-digit number ACB.

For 7 + 8 + 9: A = 7, B = 8, C = 9, giving 798. For 4 + 6 + 8: A = 4, B = 6, C = 8, giving 486.

Applying the same pattern to 5 + 2 + 4: A = 5, B = 2, C = 4, giving 542.

Explanation

The given word Mainstreaming contains the letters A (2), E (1), G (1), I (2), M (2), N (2), R (1), S (1), and T (1). The word Training requires T (1), R (1), A (1), I (2), N (2), and G (1). Every letter needed to spell Training is available in Mainstreaming in sufficient quantity.

Explanation

The series follows a pattern where the number of consecutive letters in each term increases by 1 (2, 3, 4, 5, 6), and the number of skipped letters between consecutive terms increases by 1 (2, 3, 4, 5).

AB contains 2 letters. Skipping 2 letters (C, D) gives EFG (3 letters). Skipping 3 letters (H, I, J) gives KLMN (4 letters). Skipping 4 letters (O, P, Q, R) gives STUVW (5 letters).

Skipping 5 letters (X, Y, Z, A, B) after STUVW by wrapping around the alphabet leads to CDEFGH (6 letters), confirming the sequence.

Explanation

In the evening, the Sun is in the West, so shadows fall towards the East. Since Prateek's shadow fell directly on Pranil's body, Pranil was standing to the East of Prateek. As Prateek and Pranil were talking face to face, Pranil must be facing towards Prateek, which is the West direction.

Explanation

Chaudhary Devi Lal served as the Deputy Prime Minister of India, whereas the other leaders held the office of Prime Minister of India. He served two terms as Deputy Prime Minister between 1989 and 1991, first in the government of V. P. Singh and subsequently in the government of Chandra Shekhar.

Explanation

Combining Statement I (Some bats are balls) and Statement III (All balls are racquets) logically gives Conclusion I (Some bats are racquets). Since all balls are included within racquets, any bat that is a ball must also be a racquet.

Explanation

Raining is a natural meteorological phenomenon, whereas the other terms refer to human-driven agricultural activities performed sequentially during the crop production cycle.

Explanation

Assumption I is implicit because the statement highlights that real classroom experience must be provided to pre-service teachers to make them skilled and effective, directly presupposing that such experience is an essential component of teacher training.

Assumption II is implicit because the statement conditions becoming skilled and effective on receiving training, thereby assuming that a person cannot achieve these qualities without undergoing training.

Explanation

Based on the given conditions, the arrangement of the eight boxes from top (position 1) to bottom (position 8) is:

Position 1: A Position 2: F Position 3: G Position 4: B Position 5: C Position 6: D Position 7: E Position 8: H

Verifying all the given constraints for this order: There are 2 boxes (C and D) between B and E. H is immediately below E. There is 1 box (B) between G and C. There is 1 box (F) between G and A. B is placed above both D and H. There are 2 boxes (G and B) between C and F, which is more than one box.

Thus, between box F at position 2 and box C at position 5, there are 2 boxes (G and B).

Explanation

Placing the eight persons facing the centre around the circle step by step:

B sits fourth to the right of F, which places B directly opposite F (4 positions away). F is third to the left of C, so moving three positions clockwise from C gives F. G and D are not neighbours of C or B, and exactly one person sits between G and D. This forces G and D to be placed on either side of F (with F between them). Since only one person sits between G and E, E is positioned two places away from G. A sits third to the left of E, and the remaining position is filled by H.

The complete clockwise order around the table is: F, G, H, E, B, C, A, D.

When facing the centre, counting from the right of A (counter-clockwise) towards B, C sits directly between A and B.

Explanation

The relation follows the cube root pattern where the second number is the cube root of the first number: ∛1728 = 12. Applying the same rule to 512 gives ∛512 = 8.

Explanation

Let the eight positions from left to right be numbered 1 to 8.

Yellow is fifth from the left, placing it at position 5. White is second to the left of yellow, placing White at position 3.

Blue is at the extreme right at position 8. Pink is next to blue at position 7. Since Black is sitting between Yellow at position 5 and Pink at position 7, Black is at position 6.

White at position 3 is between Brown and Red. Since Red cannot be second from the left (position 2), Red is at position 4 and Brown is at position 2.

With positions 2 through 8 filled by Brown, White, Red, Yellow, Black, Pink, and Blue respectively, position 1 at the extreme left end is filled by the remaining colour, Green.

Explanation

Interchanging the multiplication (×) and division (÷) signs in the expression 36 + 6 ÷ 3 - 20 × 5 gives:

36 + 6 × 3 - 20 ÷ 5

Following the BODMAS rule:

Division: 20 ÷ 5 = 4 Multiplication: 6 × 3 = 18 Addition and Subtraction: 36 + 18 - 4 = 50

Explanation

The sun naturally rises in the East. According to the directional mapping given in the question, East is renamed as North. Therefore, under this new naming system, the sun rises from North.

Explanation

The pattern of differences between consecutive terms in the series follows a repeating cycle of +3, +3, +7, +7:

11 + 3 = 14 14 + 3 = 17 17 + 7 = 24 24 + 7 = 31 31 + 3 = 34 34 + 3 = 37 37 + 7 = 44

To find the next term in the sequence, add 7 to 44:

44 + 7 = 51

Explanation

Combining statement 1 (Some teachers are assistants) and statement 2 (All assistants are poets) yields that the teachers who are assistants are inevitably poets. Therefore, Conclusion I (Some teachers are poets) logically follows. Conclusion II (All poets are assistants) does not follow because a universal affirmative statement (All A are B) cannot be converted directly into All B are A.

Explanation

A bat is the primary equipment used to play cricket. In the same way, a stick is the primary equipment used to play hockey.

Explanation

The difference between consecutive terms in the series doubles with each step (powers of 2):

9 - 7 = 2 (2¹) 13 - 9 = 4 (2²) 21 - 13 = 8 (2³)

Following this pattern, the next difference is 16 (2⁴). Adding 16 to 21 gives 21 + 16 = 37.

Explanation

Each letter in the cluster increases by 2 positions in forward alphabetical order:

First position: C (3) + 2 = E (5), then E (5) + 2 = G (7) Second position: H (8) + 2 = J (10), then J (10) + 2 = L (12) Third position: D (4) + 2 = F (6), then F (6) + 2 = H (8)

Applying this pattern to EJF gives the letter cluster GLH.

Explanation

The series follows a right-rotation pattern where the last character of a term moves to the first position to form the next term. Moving 'K' from the end of B7K to the beginning gives KB7. Applying the same rule to KB7, moving '7' from the end to the front yields 7KB.

Explanation

Combining the I-type statement "Some boys are birds" and A-type statement "All birds are animals" (I + A = I) yields the conclusion "Some boys are animals", which validates Conclusion I.

Converting "Some boys are animals" by simple conversion yields "Some animals are boys", which validates Conclusion II.

Explanation

By the standard rule of conversion in categorical logic, a particular affirmative proposition of the form "Some A are B" directly converts to "Some B are A". Statement 2 states that "Some girls are cricketers", which directly implies "Some cricketers are girls". A particular statement ("Some") does not imply a universal statement ("All"), which rules out Conclusion 1. Thus, Conclusion 2 alone logically follows.

Explanation

Based on the given statements: T is shorter than S but taller than U gives S > T > U. U is taller than P gives U > P. R and Q are shorter than V but taller than S gives V > (R, Q) > S.

Combining these inequalities in order yields: V > (R, Q) > S > T > U > P

Placing R before Q satisfies all given height comparisons, resulting in the valid sequence V > R > Q > S > T > U > P.

Explanation

India is a country, whereas the other three entries are continents.

Explanation

Break down the statement step by step from Arun's perspective: "My father's wife" is Arun's mother. "The mother of my father's wife" is the mother of Arun's mother (Arun's maternal grandmother). "Deepak's mother is the mother of my father's wife" means Deepak's mother is Arun's maternal grandmother.

Since Deepak and Arun's mother share the same mother, Deepak is the brother of Arun's mother. Therefore, Deepak is Arun's mother's brother (maternal uncle).

Explanation

The team consisting of P, R, S, T, and D satisfies all the given selection criteria:

Neither C nor U is included, which satisfies the condition that C and U must be selected together. B is not selected, so the restriction that neither U nor Q can be selected if B is present is automatically satisfied. Out of the group A, B, S, and T, exactly two persons (S and T) are selected. E is not selected, which satisfies the condition regarding the non-selection of S and B when E is present. A is not selected, so the requirement that B must be selected whenever A is selected is not triggered.

Explanation

The coding pattern replaces each letter with its opposite letter in the English alphabet, where the sum of the positional values of the original letter and the coded letter equals 27.

Applying this rule to PRIME: P (16) → K (11) R (18) → I (9) I (9) → R (18) M (13) → N (14) E (5) → V (22)

Applying the same opposite letter rule to SPORT: S (19) → H (8) P (16) → K (11) O (15) → L (12) R (18) → I (9) T (20) → G (7)

Thus, SPORT is coded as HKLIG.

Explanation

The series follows a pattern of alternating addition and subtraction of squares of consecutive natural numbers (1², 2², 3², 4², 5²...):

3 + 1² = 4 4 - 2² = 0 0 + 3² = 9 9 - 4² = -7

Following this logic, the missing term is: -7 + 5² = -7 + 25 = 18

Explanation

Sri Lanka is geographically classified as an island because it is a landmass completely surrounded by water. Similarly, India is classified as a peninsula because its landmass is bounded by water on three sides—the Arabian Sea on the west, the Bay of Bengal on the east, and the Indian Ocean on the south.

Explanation

Each letter in the cluster advances by one position forward in alphabetical order (+1 pattern):

First letter: D → E → F → G → H Second letter: P → Q → R → S → T Third letter: X → Y → Z → A → B

Following this rule, applying +1 to each letter of GSA gives HTB.

Explanation

Let the six positions from left to right be 1, 2, 3, 4, 5, and 6.

M3 sits to the immediate right of M5 and second to the left of M1, forming the block M5, M3, _, M1. Since M5 cannot sit at the ends of the row, M5 must be at position 2, placing M3 at position 3 and M1 at position 5.

M4 is second to the right of M2, which fits only when M2 is placed at position 4 and M4 at position 6.

The remaining position 1 is occupied by M6, giving the full order from left to right as M6, M5, M3, M2, M1, M4.

Explanation

"Your husband's daughter" refers to the woman's daughter. The statement means that the woman's daughter is the daughter of the man's brother. Therefore, the man's brother is the father of the girl, making the man her father's brother.

Explanation

Iron is a d-block transition metal that exists as a solid at standard temperature and pressure, possessing characteristic metallic properties such as high electrical and thermal conductivity, high density, malleability, and ductility.

Explanation

Mile is a unit of length belonging to the Imperial and United States customary systems of measurement, whereas the standard units of length in the International System of Units (SI) are derived from the metric system.

Explanation

Each letter in the cluster consists of four consecutive alphabetical letters. The positional values of the letters decrease by 5 from one cluster to the next: M(13) - 5 = H(8) and H(8) - 5 = C(3). Subtracting 5 from each letter of HIJK gives CDEF (H-5 = C, I-5 = D, J-5 = E, K-5 = F).

Explanation

The coding pattern alternates between adding 1 and subtracting 1 (+1, -1, +1, -1, +1, -1) to the alphabetical position of each letter. In CRACKS, C+1=D, R-1=Q, A+1=B, C-1=B, K+1=L, and S-1=R.

Applying this same pattern to SPROUT yields S+1=T, P-1=O, R+1=S, O-1=N, U+1=V, and T-1=S, resulting in TOSNVS.

Explanation

The series is formed by adding the cubes of consecutive odd numbers (1, 3, 5, 7, ...) to each preceding term:

3 + 1³ = 4 4 + 3³ = 4 + 27 = 31 31 + 5³ = 31 + 125 = 156 156 + 7³ = 156 + 343 = 499