RRB NTPC 2021 PYQs

Question 1

In a certain code language, BOX is written as OBK, LAY is written as YNL and COP is written as PBC. How will HUNDRED be written in that language?

Accepted Answer

The pattern is: first letter moves to second position, second letter moves to third position, and third letter is replaced by its opposite letter (A-Z, B-Y, etc.). Applying this to HUNDRED gives UHAQERQ.

Question 2

If CPHUDQ = 6 and BOY = 6, then which of the given options will FUNDAMENTAL be equal to?

Accepted Answer

The pattern is to count the number of vowels in the given word. CPHUDQ has 2 vowels (U), BOY has 1 vowel (O). The given values are incorrect. Assuming the pattern is the number of vowels, FUNDAMENTAL has 3 vowels (U, A, E).

Question 3

Select the option in which the words share the same relationship as that shared by the given pair of words.Cat ∶ Mew ∶∶ ? : ?

Accepted Answer

The relationship is 'Animal : Sound'. A cat mews. Similarly, a duck quacks. This direct association makes option 1 correct.

Question 4

Count the number of triangles in the following figure.

Accepted Answer

Count triangles systematically: 3 small, 3 medium, 3 large, and 3 inverted triangles. Total 12 triangles.

Question 5

D has a brother A. D is the son of C. B is C's father. In terms of relationship, what is A of B?

Accepted Answer

D is C's son, and A is D's brother, so A is also C's son. B is C's father, making B the grandfather of A. Thus, A is B's grandson.

Question 6

Which of the following is same as foot, inch and yard?

Accepted Answer

Foot, inch, and yard are all units of length. Mile is also a unit of length, making it the correct match among the options.

Question 7

Select the option that is related to the third expression in the same way as the second expression is related to the first expression.L × V : 12 × 22 :: Q × Z : ?

Accepted Answer

The pattern maps each letter to its alphabetical position. L is 12th, V is 22nd. Similarly, Q is 17th and Z is 26th. So, Q × Z becomes 17 × 26.

Question 8

There are 10 persons sitting in a circle facing each other. A and J are sitting opposite to each other, whereas F and H are sitting opposite to each other. A and I are sitting to the immediate right and immediate left of B, respectively. H is sitting in between I and D. On the basis of the given information, which of the following is correct?

Accepted Answer

Place B, then A to its right and I to its left. H is between I and D. Since F and H are opposite, and A and J are opposite, the arrangement confirms I is between H and B.

Question 9

In a group of 20 students, 15 opt for English, 10 opt for Hindi. Five students are studying both languages. How many students are studying only English?

Accepted Answer

Total English students are 15. Since 5 students study both, subtract them from the total English students to find those studying only English: 15 - 5 = 10.

Question 10

Identify the number from the given options, that does NOT belong to the following series.1, 7,  25, 61, 125

Accepted Answer

The series follows the pattern n³ - n. For n=2, 2³-2=6. The given series has 1, 7, 25, 61, 125. The number 125 does not fit this pattern, as it is 5³ and not 5³-5.

Question 11

Consider the given statements and decide which of the given conclusions do NOT follow from the statements.Statements:All Bulls are Black but not Cows.All Cows are Black.Conclusions:1. Some Cows are Bulls.2. All Blacks are Cows.3. All Blacks are Bulls.

Accepted Answer

From the statements, Bulls are Black, and Cows are Black, but Bulls are not Cows. Therefore, no conclusion directly follows. Conclusions 1, 2, and 3 are all incorrect based on the given information.

Question 12

Out of the four materials listed, three are alike in some manner and one is different. Select the odd one.

Accepted Answer

Gold, Iron, and Silver are naturally occurring elements (metals). Steel is an alloy, meaning it's a mixture of iron and carbon, not a pure element.

Question 13

Select the word from the options, which is similar to the given words in a certain manner:Stable, Burrow, Nest

Accepted Answer

Stable, Burrow, and Nest are all types of shelters or homes for animals. Den is also a type of animal home, specifically for wild animals like lions or foxes.

Question 14

After starting from a point, Naveen walks 3 km towards the east. Then turning to his left he moves 3 km. After this he again tums his left and moves 4 km. In which direction is he standing from his starting point?

Accepted Answer

Naveen walks 3km East, then 3km North (left turn), then 4km West (left turn). From the start, he is 1km West and 3km North, placing him in the North-west direction.