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

Explanation

Let the five positions from left to right be 1, 2, 3, 4, and 5. Since Ram and Rahim occupy the extreme ends, they must be at positions 1 and 5. Ram is sitting second to the right of Raj, which means Ram must be at position 5 (the right extreme) and Raj at position 3. Rahim consequently sits at position 1 (the left extreme). Rahul cannot sit next to Ram, so Rahul cannot be at position 4, placing Rahul at position 2 and Rocky at position 4. The order from left to right is Rahim (1), Rahul (2), Raj (3), Rocky (4), and Ram (5). Moving three positions to the left from Rocky (position 4) leads to position 1, where Rahim is seated.

Explanation

The given pair follows the relationship of a professional and their workplace, where a chef works in a restaurant. Similarly, a druggist is a professional who works in a pharmacy.

Explanation

A fracture refers specifically to a crack or break in a bone. Similarly, a sprain refers specifically to an injury caused by the stretching or tearing of a ligament, which is the fibrous connective tissue that connects bones to other bones at a joint.

Explanation

The proverb "A 'well done' is better than a 'well said'" emphasizes that performing good actions is superior to merely speaking eloquent words. In this context, 'well done' signifies concrete deeds, while 'well said' refers to speeches or verbal expressions. Therefore, the statement directly implies that actions create a deeper and more meaningful impact than words alone.

Explanation

The English alphabet contains 26 letters. Deleting every 3rd letter removes 8 letters (at positions 3, 6, 9, 12, 15, 18, 21, and 24), leaving a total of 18 letters in the new series.

The 12th letter from the right in an 18-letter series is at position 18 - 12 + 1 = 7th from the left.

Since every 3rd letter is omitted, the remaining letters from the left in sequence are A, B (1st, 2nd), D, E (3rd, 4th), G, H (5th, 6th), and J (7th).

Explanation

Replacing the letters with their corresponding mathematical operators gives:

48 + 24 ÷ 12 × 3 - 4

Applying the order of operations (BODMAS):

First, perform division: 24 ÷ 12 = 2 Expression becomes: 48 + 2 × 3 - 4

Next, perform multiplication: 2 × 3 = 6 Expression becomes: 48 + 6 - 4

Finally, perform addition and subtraction from left to right: 48 + 6 = 54 54 - 4 = 50

Explanation

In three of the letter-clusters, the second letter is located 3 positions after the first letter in alphabetical order (W + 3 = Z, D + 3 = G, Q + 3 = T). In HJK, the second letter J is located only 2 positions after H (H + 2 = J), making it the odd one out.

Explanation

The series follows a pattern where each term increases by 4 in alphabetical position:

Position 1: K = 11 Position 2: 11 + 4 = 15 = O Position 3: 15 + 4 = 19 = S Position 4: 19 + 4 = 23 = W Position 5: 23 + 4 = 27 (or 1) = A Position 6: 1 + 4 = 5 = E

The top row alternates between letters and positional values: K (11), 15, S (19), 23, A (1), so the next entry in the top row is the number 5. The bottom row alternates similarly: 11, O (15), 19, W (23), 1, so the next entry in the bottom row is the 5th letter, E.

Explanation

The given series follows three simple patterns:

First letter: Decreases by 4 positions in alphabetical order (X = 24, T = 20, P = 16, L = 12, H = 8). The next letter is 8 - 4 = 4, which corresponds to D.

Number: Increases by 45 in each step (90, 135, 180, 225, 270). The next number is 270 + 45 = 315.

Second letter: Increases by 4 positions in alphabetical order (D = 4, H = 8, L = 12, P = 16, T = 20). The next letter is 20 + 4 = 24, which corresponds to X.

Combining these yields D315X.

Explanation

The statement explicitly attributes Vikansh's inability to solve his math problem to the absence of Gavaskar. This establishes a causal relationship showing that Gavaskar's presence and assistance are necessary for Vikansh to complete his math work, which makes Assumption M implicit. Assumption L is not implicit because the statement shows Vikansh relies on Gavaskar's help rather than solving problems independently.

Explanation

In OPR, the positional values of the letters in the English alphabet are O = 15, P = 16, and R = 18, which follow a pattern of +1 and +2 between consecutive letters. In contrast, all other clusters follow a uniform pattern of +2 between consecutive letters.

Explanation

From the given statements, Guijo is female as she is Umra's mother, and Shahid is Hifzan's father.

Since Munni is Hifzan's paternal aunt, she is the sister of Hifzan's father, Shahid. Since Munni is also Umra's maternal aunt, she is the sister of Umra's mother, Guijo.

Because Munni is the sister of both Shahid and Guijo, Shahid and Guijo are siblings. As Guijo is female, she is Shahid's sister.

Explanation

The coding scheme replaces each letter with its reverse alphabetical counterpart, where the sum of the numerical positions of the original letter and its coded letter in the alphabet equals 27.

S (19) + H (8) = 27 M (13) + N (14) = 27 I (9) + R (18) = 27 L (12) + O (15) = 27 E (5) + V (22) = 27

Applying the same rule to TEACH: T (20) → 27 - 20 = 7 (G) E (5) → 27 - 5 = 22 (V) A (1) → 27 - 1 = 26 (Z) C (3) → 27 - 3 = 24 (X) H (8) → 27 - 8 = 19 (S)

Explanation

Country X initiating a war against country Y at the beginning of the year created an active military conflict. This outbreak of warfare directly leads to battlefield engagements and military casualties on the opposing side throughout the course of the conflict. Therefore, the initiation of war by country X serves as the immediate and principal cause, while the loss of many soldiers' lives in country Y over the year is its direct effect.

Explanation

Each letter of the word is coded into two letters: its preceding letter and its succeeding letter in the English alphabetical order.

For LIE: L gives K and M (KM) I gives H and J (HJ) E gives D and F (DF)

Combining these pairs gives KMHJDF.

Explanation

By analyzing the repeated letters in each word: From ELE, the repeated letter E corresponds to D, so E = D and L = #. From AROMA, the repeated letter A corresponds to @, so A = @. Comparing AROMA and ROSE, the common letters are R and O, which map to % and S. The remaining letter M in AROMA corresponds to U. Thus, the symbols for the letters in MAREO are M = U, A = @, R = %, E = D, and O = S. Combining these codes gives @ U % S D.

Explanation

Fever is a physiological symptom characterized by an abnormal elevation in body temperature, usually occurring as part of the immune system's response to an underlying illness or infection. It is a sign or clinical manifestation rather than a specific medical disease caused by a particular pathogen.

Explanation

Geller's father is Ross's brother. Since Gunther is the father of Geller's father, Gunther is the father of Ross's brother, making Gunther the father of Ross as well. Ross is therefore Gunther's son. As Angela is married to Ross, Angela is Gunther's son's wife.

Explanation

The pattern in the series is obtained by multiplying each term by 2 and adding 2 to get the next term:

9 × 2 + 2 = 20 20 × 2 + 2 = 42 42 × 2 + 2 = 86 86 × 2 + 2 = 174 174 × 2 + 2 = 350 350 × 2 + 2 = 702

Alternatively, the difference between consecutive terms doubles at each step (11, 22, 44, 88, 176, 352), giving 350 + 352 = 702.

Explanation

For Height: From the statements, Q is shorter than R (R > Q), P is taller than R but shorter than T (T > P > R), and P is taller than S (P > S). Combining these relations shows that T > P > R > Q and T > P > S. Since T is taller than P, and P is taller than R, S, and Q, T is the tallest among all five friends.

For Age: From the statements, Q is elder to S (Q > S), T is elder to S (T > S), P is younger to S (S > P), and R is elder to Q (R > Q). Combining these relations gives R > Q > S > P and T > S. Since P is younger than S, and everyone else is elder to S, P is the youngest among all five friends.

Explanation

Statement I establishes that all children are contained within the category of bottles, while Statement II states that no bottles are intelligent. Since children are a subset of bottles and the set of bottles has zero overlap with the set of intelligent entities, no children can be intelligent. Therefore, conclusion II logically follows.

Explanation

Analyzing the sequence position by position:

1st letter increases by +2 in positional value: M (13) + 2 = O (15) + 2 = Q (17) + 2 = S (19). 2nd letter remains constant as A throughout. 3rd letter increases by +2 in positional value: N (14) + 2 = P (16) + 2 = R (18) + 2 = T (20). 4th letter remains constant as Z throughout.

Combining these rules gives the letters S, A, T, and Z in sequence.

Explanation

Combining statement 1 (All remotes are infrared) and statement 2 (All infrared are gamma) gives the valid universal affirmative proposition: All remotes are gamma. By immediate conversion of a universal proposition (All A are B implies Some B are A), it logically follows that Some gamma are remotes. Thus, conclusion 2 validly follows.

Explanation

A hospital is an institution where a patient receives medical care and treatment. Similarly, a college is an educational institution where a student receives education and instruction.

Explanation

The standard pattern follows two rules: the middle number is twice the positional value of the first letter, and the third letter's positional value is equal to the sum of the first letter's positional value and the middle number. For C6J, the first letter C has a positional value of 3, so the middle number is 3 × 2 = 6. Adding 3 and 6 yields 9, which corresponds to the letter I, but the term incorrectly uses J (10th letter).

Explanation

The second number is obtained by multiplying the individual digits of the first number: 5 × 5 × 5 = 125

Applying the same rule to the third number: 7 × 7 × 7 = 343

Explanation

Converting the letters to their numerical positions in the English alphabet gives T = 20, P = 16, L = 12, and H = 8. The series follows a pattern where each term is obtained by subtracting 4 from the preceding term (20 - 4 = 16, 16 - 4 = 12, 12 - 4 = 8). Subtracting 4 from 8 yields 4, which corresponds to the 4th letter of the alphabet, D.

Explanation

Interchanging 29 and 44 in the given expression gives: 44 - 19 + 25 × 87 ÷ 29

Applying BODMAS rules: First, division: 87 ÷ 29 = 3 Next, multiplication: 25 × 3 = 75 Finally, addition and subtraction: 44 - 19 + 75 = 25 + 75 = 100

This matches the value on the right-hand side of the equation.

Explanation

The given series follows an alternating operation pattern of subtracting 2 and adding 6: 11 - 2 = 9 9 + 6 = 15 15 - 2 = 13 13 + 6 = 19 19 - 2 = 17

Alternatively, the series consists of two interleaved sub-series, where terms at odd positions (11, 15, 19) increase by 4, and terms at even positions (9, 13, ?) also increase by 4, giving 13 + 4 = 17.

Explanation

Position of F from the left end = Total students - Position from right end + 1 = 24 - 17 + 1 = 8

Number of students between F (8th from left) and R (19th from left) = Position of R - Position of F - 1 = 19 - 8 - 1 = 10

Explanation

The coding follows an alternating shift pattern of -2 and +2 applied to the alphabetical positions of each letter: F - 2 = D, I + 2 = K, L - 2 = J, and E + 2 = G. Applying the same rule to RAIL: R - 2 = P, A + 2 = C, I - 2 = G, and L + 2 = N, which gives PCGN.

Explanation

Decoding the given expression 'A % B # C @ D S E':

B # C means B is the father of C. C @ D means C is the sister of D, which establishes that C and D are siblings with B as their father. D S E means D is the wife of E, which confirms that D is female.

Since D is a female child of B, D is the daughter of B.

Explanation

The operation defined by the arrow symbol follows the pattern: (a × b) ÷ 2 + 1

Applying this formula to the given equations: 9 → 6 = (9 × 6) ÷ 2 + 1 = 27 + 1 = 28 7 → 4 = (7 × 4) ÷ 2 + 1 = 14 + 1 = 15 3 → 8 = (3 × 8) ÷ 2 + 1 = 12 + 1 = 13

Applying the same pattern to the fourth equation: 3 → 6 = (3 × 6) ÷ 2 + 1 = 9 + 1 = 10

Explanation

The numerators of all terms in the series are 1, while the denominators are squares of consecutive odd numbers starting from 5:

5² = 25 7² = 49 9² = 81

Following this pattern, the next denominator is 11² = 121, making the missing term 1/121.

Explanation

Taking the starting point as the origin (0, 0): Walking 5 m south moves him to (0, -5). Turning east and walking 5 m moves him to (5, -5). Turning left (north) and walking 10 m moves him to (5, 5). Turning left (west) and walking 5 m moves him to (0, 5).

The distance between the starting point (0, 0) and the final point (0, 5) is 5 m.

Explanation

The relationship in the given pair is that Coal is a specific type or member of the general category Fuel. Similarly, an Ant is a specific type or member of the class Insect, following the same "Specific instance : Category" relationship.

Explanation

A is married to B, making B her husband. C is the father of B, D, and E, which means B, D, and E are siblings. Since E is the daughter of C and also the daughter of M, M is the mother of the children (B, D, and E). As M is the mother of B, M is A's husband's mother.

Explanation

Taking home as the origin (0, 0):

Net displacement along the East-West (X) axis: -800 m (West) + 250 m (East) + 550 m (East) = 0 m

Net displacement along the North-South (Y) axis: -300 m (South) + 450 m (North) + 150 m (North) = +300 m (North)

Her current position is 300 m North of her home. To reach back home, she must travel 300 m southwards.

Explanation

Cooking is a culinary process of preparing food for consumption, making it a culinary or household activity rather than a form of physical exercise or workout routine.

Explanation

The series follows a pattern where the first letter increases by 1 position (F → G → H → I) and the second letter decreases by 1 position (U → T → S → R). Additionally, each pair consists of reverse alphabetical letter pairs whose positional values sum to 27 (F=6 + U=21 = 27, G=7 + T=20 = 27, H=8 + S=19 = 27, I=9 + R=18 = 27).

Explanation

The coding rule arranges the letters at odd-numbered positions (1st, 3rd, 5th, 7th) first, followed by the letters at even-numbered positions (2nd, 4th, 6th).

In AIRPORT: Odd positions (1, 3, 5, 7): A, R, O, T Even positions (2, 4, 6): I, P, R Combining both gives AROTIPR.

Applying the same rule to ANALOGY: Odd positions (1, 3, 5, 7): A, A, O, Y Even positions (2, 4, 6): N, L, G Combining both gives AAOYNLG.

Explanation

By immediate conversion of an I-type statement, "Some animals are clocks" directly yields "Some clocks are animals", making conclusion B logically valid. An A-type statement "All animals are birds" can only be partially converted to "Some birds are animals", so "All birds are animals" in conclusion A does not logically follow.

Explanation

A balance is an instrument used to measure weight. Following the same functional relationship, a measuring tape is an instrument used to measure length.

Explanation

Breaking down the statement step-by-step:

"My father's daughter" refers to Shreyas's sister. "The only brother of my father's daughter" refers to the only brother of Shreyas's sister, which is Shreyas himself. "He is the son of the only brother..." means the boy in the picture is Shreyas's son.

Since the boy is Shreyas's son, Shreyas is the father of the boy.

Explanation

Since all fans are mixers and no mixer is a fridge, no fan can be a fridge, which directly validates conclusion III.

For conclusion II, the statements mention that some fridges are machines, meaning there is an overlap between fridges and machines. Since no mixer is a fridge, those machines which are fridges can never be mixers. This confirms that some machines are not mixers.

Explanation

The given series follows three distinct logic patterns for the individual components:

The first letter decreases by 2 in alphabetical positional value (P=16, N=14, L=12, J=10, H=8), making the next letter F (6).

The middle number is a sequence of consecutive prime numbers starting from 3 (3, 5, 7, 11, 13), making the next prime number 17.

The last letter increases by 2 in alphabetical positional value (L=12, N=14, P=16, R=18, T=20), making the next letter V (22).

Combining these results gives F17V.

Explanation

The logic followed is: (Sum of digits of first number) − (Difference of digits of second number) = Result

For 92 × 32: (9 + 2) − (3 − 2) = 11 − 1 = 10 For 73 × 41: (7 + 3) − (4 − 1) = 10 − 3 = 7 For 26 × 78: (2 + 6) − (7 − 8) = 8 − (−1) = 8 + 1 = 9

Applying the same pattern to 33 × 28: (3 + 3) − (2 − 8) = 6 − (−6) = 6 + 6 = 12

Explanation

Arranging the individuals in decreasing order of height based on the given conditions: From K being shorter than N but taller than M, we get N > K > M. From J being taller than K but shorter than N, we get N > J > K.

Combining both relations yields the complete order of height from tallest to shortest: N > J > K > M.

M is at the lowest position in height among all four persons.

Explanation

B is the mother of C and C is the daughter of A, which means A is C's father. Since D is the sister of C, A is also the father of D. E is the son of D, so D is the mother of E. Because A is the father of E's mother (D), A is the mother's father of E.

Explanation

The coding follows a pattern where consecutive odd numbers (+1, +3, +5, +7) are added to the alphabetical position of each letter:

M (13) + 1 = 14 (N) O (15) + 3 = 18 (R) R (18) + 5 = 23 (W) E (5) + 7 = 12 (L)

Applying the same pattern to FOUR:

F (6) + 1 = 7 (G) O (15) + 3 = 18 (R) U (21) + 5 = 26 (Z) R (18) + 7 = 25 (Y)

This gives the coded word GRZY.