RRB NTPC 2021 PYQs

Question 1

Select the letter clusters from among the given options that can replace the question mark (?) in the following series.ab, cc, ed, ge, ?

Accepted Answer

The first letters follow a pattern: a (+2) c (+2) e (+2) g (+2) i. The second letters follow: b (+1) c (+1) d (+1) e (+1) f. Thus, the next term is 'if'.

Question 2

If in a certain code, INTERNET is written as TENRETNI, then in the same code, REMEMBER would be written as:

Accepted Answer

The code reverses the entire word. INTERNET becomes TENRETNI. Applying the same logic, REMEMBER reversed is REBMEMER.

Question 3

Select the option that is closest to the given shapes?Square, Rhombus, Rectangle, Parallelogram

Accepted Answer

All the given shapes (Square, Rhombus, Rectangle, Parallelogram) are types of quadrilaterals, which are polygons with four sides. Thus, Quadrilateral is the most appropriate classification.

Question 4

Five persons A,B,C,D and E are sitting one above the other on a ladder (not necessarily in the same order) B is sitting above A with one person between them. Only two persons are sitting between A and C. If C is not sitting top, then who is sitting in the middle?

Accepted Answer

From the given conditions, the arrangement is B _ A _ C. Since C is not at the top, the only possible arrangement is E B D A C. Thus, B is in the middle.

Question 5

In a code language, if RAMAN is written as 47, then how will ARJUN be written as in that language?

Accepted Answer

Assign numerical values to letters (A=1, B=2,...). RAMAN = 18+1+13+1+14 = 47. Similarly, ARJUN = 1+18+10+21+14 = 64.

Question 6

If '÷ ' means '+', '+' means '-', '-' means '×' and '×' means '÷', then what will the value of 16 ÷ 4 × 2 + 5 - 3 be?

Accepted Answer

Substitute the given symbols: 16 + 4 ÷ 2 - 5 × 3. Following BODMAS, calculate 16 + 2 - 15 = 18 - 15 = 3.

Question 7

In a certain code language, HSBTQ is written as CNWOL. How will DSBOF be written as in that code language?

Accepted Answer

The pattern is -5, +7, -7, +7, -7 for each letter. Applying this to DSBOF: D-5=Y, S+7=Z, B-7=U, O+7=V, F-7=Y. So, DSBOF becomes YZWUY.

Question 8

Study the given Venn diagram and answer the question that follows.In the given Venn diagram, which part stands for government employees who are honest, intelligent but NOT hardworking?

Accepted Answer

Identify the intersection of 'Government Employees' (circle), 'Honest' (triangle), and 'Intelligent' (rectangle). Then, exclude any part that falls within 'Hardworking' (square). The region 'f' satisfies all conditions.

Question 9

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

Accepted Answer

Numbers 4913 (17³), 1000 (10³), and 1728 (12³) are perfect cubes. 3315 is not a perfect cube, making it the odd one out.

Question 10

The 5thpart of a number when divided by 3 yields three times half of tenth part of half of 80. What is the number?

Accepted Answer

Let the number be x. Form the equation: (x/5)/3 = 3 * (1/10) * (1/2) * 80. Simplify the right side to 12. Then x/15 = 12, so x = 180. Wait, the question says 'three times half of tenth part of half of 80'. So, 3 * (1/2) * (1/10) * (1/2) * 80 = 6. Then x/15 = 6, so x = 90.

Question 11

In one of the following letter-clusters, the number of letters skipped in between the adjacent letters is in a decreasing sequence. Identify the letter-cluster.

Accepted Answer

Analyze the gap between adjacent letters in each option. Option 4 (VQMJH) shows gaps of 4, 3, 2, 1, which is a decreasing sequence. All other options do not follow this pattern.

Question 12

In a certain code language. VAGABOND is written as NDVABOGA. How will PRACTICE be written as in that language?

Accepted Answer

The word is divided into two halves. The second half is written first, then the first half, both in reverse order. VAGABOND (8 letters) -> VAGA | BOND -> DN OB | AG AV -> NDVABOGA. Apply this to PRACTICE (8 letters): PRAC | TICE -> ECIT | CARP -> CEPRTIAC.

Question 13

A team is to be selected from 13 players P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12 and P13. There will be seven players in the team. P2 cannot be selected with P1, P6 or P4. P7 cannot be selected with P2, P10, P11 or P13. If P8 and P13 both are selected, then P5 must be selected. P4 cannot be selected with P2, P10, P12 or P11. Which of the following is a correct selection of the team?

Accepted Answer

Evaluate each option against the given conditions. Option 1 fails as P4 and P6 are together, violating P2's rule (P2 cannot be with P4 or P6, but P4 and P6 are incompatible). Option 2 fails as P4 and P11 are together. Option 4 fails as P2 and P7 are together. Option 3 satisfies all conditions.

Question 14

Reading the English alphabet from left to right, what is the 5thletter to the right of the 14thletter?

Accepted Answer

The 14th letter in the English alphabet is N. Counting 5 letters to the right of N (N+5) gives us S. So, the correct answer is S.

Question 15

How many numbers are present between 50 and 100 (Both excluding) which contains digit 5 and can be, exactly divisible by digit 5?

Accepted Answer

Numbers between 50 and 100 containing '5' are 51-59, 65, 75, 85, 95. From these, numbers divisible by 5 are 55, 65, 75, 85, 95. There are 5 such numbers.

Question 16

If '÷' means '+', '–' means '×', '×' means '–' and '+' means '÷', then find the value of40 ÷ 20 × 10 + 10 – 5.

Accepted Answer

Substitute the given symbols: 40 + 20 - 10 ÷ 10 × 5. Following BODMAS, calculate 10 ÷ 10 = 1, then 1 × 5 = 5. Finally, 40 + 20 - 5 = 55.

Question 17

Select the Venn diagram that best represents the relationship between the given set of classes.Polygons, Quadrilaterals and Triangles

Accepted Answer

All quadrilaterals and triangles are polygons. Quadrilaterals and triangles are distinct shapes, so they are separate circles within the polygon circle.

Question 18

Ram has 15 toffees, 10 biscuits and 5 chocolates. He gave one-third toffees to Sohan and half of the biscuits to Mohan. Sohan exchanged all toffees with Mohan against two biscuits. Mohan gave the remaining biscuits to Ram to get two chocolates. How many biscuits will be left with Ram, if he gives half of the biscuits, in the end, to Sohan?

Accepted Answer

Ram starts with 10 biscuits. He gives 5 to Mohan. Sohan gives 2 biscuits to Ram. Mohan gives 3 biscuits to Ram. Ram now has 10 - 5 + 2 + 3 = 10 biscuits. Finally, Ram gives half (5) to Sohan, leaving 5 biscuits.

Question 19

Select the number from the given options, that will come next in the following series.6, 16, 27, __

Accepted Answer

The differences between consecutive terms are +10, +11. Following this pattern, the next difference should be +12. So, 27 + 12 = 39.

Question 20

Observe the bar graph and answer the question below.The total annual earnings of a family of four members is Rs. 12 lakhs. The bar graph shows the percentage of contribution of each family member.What is the difference in the salary of the highest and the lowest earning members?

Accepted Answer

Identify the highest (40%) and lowest (27%) earning percentages from the graph. Calculate their difference (40% - 27% = 13%). Then, find 13% of the total annual earnings (Rs. 12 lakhs) to get the salary difference.