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

Explanation

When Davy states that every pancake made by his mother is lip-smacking, Jones counters by pointing out that Davy's father also makes lip-smacking pancakes. For Jones's objection to be relevant to his own understanding of Davy's claim, Jones must have assumed Davy meant that exclusively or only his mother makes lip-smacking pancakes. Bringing up another person who makes delicious pancakes only serves to refute a claim of exclusivity, showing that Jones misinterpreted Davy's statement as meaning that no one else could make lip-smacking pancakes.

Explanation

The coding rule replaces each letter with the one whose alphabetical position sums to 26 with the original position, so Original Position + Code Position = 26.

Applying this pattern to UNSURE: U (21) → 26 - 21 = 5 (E) N (14) → 26 - 14 = 12 (L) S (19) → 26 - 19 = 7 (G) U (21) → 26 - 21 = 5 (E) R (18) → 26 - 18 = 8 (H) E (5) → 26 - 5 = 21 (U)

To decode YNYHM back to the original word using Original Position = 26 - Code Position: Y (25) → 26 - 25 = 1 (A) N (14) → 26 - 14 = 12 (L) Y (25) → 26 - 25 = 1 (A) H (8) → 26 - 8 = 18 (R) M (13) → 26 - 13 = 13 (M)

This yields the word ALARM.

Explanation

The statement that all balls vibrate establishes that vibrating is a universal property of every ball. Since every ball vibrates without exception, any ball that does not bounce is still a ball and must therefore vibrate. This directly validates Conclusion I. Conclusion II contradicts the premise because no ball can exist without vibrating. Hence, only Conclusion I logically follows.

Explanation

Argument (i) lacks any supporting logical reason or evidence as to why separating children from home is beneficial, making it a weak assertion. In contrast, argument (ii) addresses a significant emotional and psychological concern, explaining that prolonged separation from parents can lead to anxiety, feelings of isolation, and weakened family bonds, which directly affects a child's overall well-being.

Explanation

Combining the statement "Some eggs are onions" with "All onions are blue" yields the valid inference "Some eggs are blue", which does not guarantee that all eggs are blue. Thus, Conclusion I does not follow.

The statement "Some eggs are onions" converts logically to "Some onions are eggs", which does not imply that all onions are eggs. Thus, Conclusion II does not follow.

Explanation

Each set of three numbers is formed by taking the square root of the first given number, the square root of the second given number, and their sum.

Applying this pattern to 121 and 81: First number = √121 = 11 Second number = √81 = 9 Third number = 11 + 9 = 20

Explanation

When the distance traveled is constant, time taken is inversely proportional to speed (Time = Distance / Speed).

Given the speed ratio of the three cars is 2 : 3 : 4, the ratio of time taken is:

1/2 : 1/3 : 1/4

Multiplying each term by the LCM of the denominators (LCM of 2, 3, and 4 is 12):

(1/2 × 12) : (1/3 × 12) : (1/4 × 12) = 6 : 4 : 3

Explanation

Walter, Heisenberg, and Eva are siblings because Walter and Heisenberg are twin brothers and Heisenberg is Eva's brother. Since Newton is Eva's father, he is also Walter's father, which means Walter's mother is Newton's wife. Newton is Skyler's brother, so Skyler is the sister of Newton (Walter's father). Therefore, Skyler is the sister of Walter's mother's husband, making her Walter's mother's husband's sister.

Explanation

The code value is obtained by taking the sum of the standard positional values of each letter in the English alphabet (A = 1, B = 2, ..., Z = 26).

For ALBINISM: A(1) + L(12) + B(2) + I(9) + N(14) + I(9) + S(19) + M(13) = 79

Applying the same rule to NEURON: N(14) + E(5) + U(21) + R(18) + O(15) + N(14) = 87

Explanation

Both arguments present logical, relevant, and compelling perspectives on child development. Argument (i) points out the cognitive benefits, as war-type strategy games encourage critical thinking, resource management, and forward planning. Argument (ii) highlights an equally valid developmental concern, noting that violent or war-centric themes can negatively influence moral growth and value orientation in young minds. Each argument directly addresses a crucial practical or ethical dimension regarding the well-being of children.

Explanation

Principal is an administrative post and leadership designation within an educational institution rather than an independent primary profession. While standard professions define specialized fields of individual occupation requiring specific vocational training, a principal represents an executive role or administrative headship.

Explanation

Let the writing order of the five girls be numbered 1 to 5 from first to last.

Since the first writer gave the novel to Riya, Riya is the second writer (2nd). Since the last writer took the novel from Priya, Priya is the fourth writer (4th). Since there are two writers between Usha and Priya, Usha must be the first writer (1st), as positions 2 and 3 fall between 1 and 4. Since Tina is neither the first nor the last writer, Tina takes the third position (3rd). This leaves Shreya as the fifth and last writer (5th).

Explanation

A train is a vehicle or instrument used for the function of traveling. Similarly, a pen is an instrument used for the function of writing. Both word pairs exhibit the relationship of an object and its primary function or purpose.

Explanation

Each letter in the word is shifted backward by 2 positions in the alphabetical order.

Applying the same rule to EFRON: E - 2 = C F - 2 = D R - 2 = P O - 2 = M N - 2 = L

Thus, EFRON is coded as CDPML.

Explanation

The given pair shares an example-to-category relationship, where a kingfisher is a specific type belonging to the category of birds. Similarly, an apple is a specific instance that belongs to the broader category of fruits.

Explanation

In the pair Nut : Almond, the relationship is structured as Category : Specific, where Nut represents the general class and Almond is a specific member of that class. The other pairs follow the opposite order of Specific : Category.

Explanation

Fillers refer to dental materials or substances used to fill cavities and restore damaged teeth. Unlike natural types of human teeth, fillers are artificial materials used in dental treatment.

Explanation

The numbers 2, 3, 5, 7, 11 are consecutive prime numbers, making the next number 13. The letters A(1), C(3), F(6), J(10), O(15) follow a pattern where the difference in alphabetical positions increases by 1 each time (+2, +3, +4, +5). Adding 6 to the positional value of O (15 + 6 = 21) gives the 21st letter, U.

Explanation

Placing the signs sequentially in the given equation yields:

57 ÷ 3 × 2 + 2 = 15 + 25

Applying the BODMAS rule:

Left-hand side (LHS): First, perform division: 57 ÷ 3 = 19 Next, perform multiplication: 19 × 2 = 38 Finally, perform addition: 38 + 2 = 40

Right-hand side (RHS): 15 + 25 = 40

Since LHS = RHS = 40, the equation is balanced.