RRB NTPC 2020 PYQs

Question 1

Who was the chief guest at the Republic Day celebrations of India in 2020?

Accepted Answer

Jair Bolsonaro, the then President of Brazil, was the chief guest at India's Republic Day celebrations in 2020. This is a direct factual recall question.

Question 2

By selling an article for Rs.138, a shopkeeper losses 8%. At what price should the article be sold to get a gain of 4%?

Accepted Answer

If 138 represents 92% (100-8%) of the cost price, then 1% is 138/92. To gain 4%, calculate 104% of the cost price: (138/92) * 104 = 1.5 * 104 = 156.

Question 3

In a certain code language, ACCESS is written as 13351919. How will EXCELLENCE be coded as in that language?

Accepted Answer

Each letter is replaced by its alphabetical position. A=1, C=3, E=5, S=19. Apply this rule to EXCELLENCE: E=5, X=24, C=3, E=5, L=12, L=12, E=5, N=14, C=3, E=5.

Question 4

In certain code language, LEADER is written as ELDARE How will FOUNTAIN be written as in that code language?

Accepted Answer

The pattern involves swapping adjacent letters in pairs. LEADER becomes ELDARE (LE->EL, AD->DA, ER->RE). Applying this to FOUNTAIN: FO->OF, UN->NU, TA->AT, IN->NI. Thus, FOUNTAIN becomes OFNUATNI.

Question 5

The conclusion that follows from the premises 'All voters are citizens' and 'All citizens are loyalists' is:

Accepted Answer

This is a direct syllogism. If all voters are citizens, and all citizens are loyalists, then it logically follows that all voters must also be loyalists.

Question 6

In a certain code, P is coded as 17 and TMR is coded as 54. How will NARESH be written as in that code?

Accepted Answer

The code assigns a value based on the alphabetical position plus one. P is 16+1=17. TMR is (20+1)+(13+1)+(18+1) = 21+14+19=54. So, NARESH is (14+1)+(1+1)+(18+1)+(5+1)+(19+1)+(8+1) = 15+2+19+6+20+9 = 71.

Question 7

Shanti’s daughter Chandini is married to Abhi. Anchal is married to Sandy, the grandson of Shanti. Abhi's grandson is Karan. Rashmi is the mother of Karan. Shaurya is Anchal's son. How is Shaurya related to Karan?

Accepted Answer

Shanti's daughter Chandini is married to Abhi. Sandy is Shanti's grandson, married to Anchal. Karan is Abhi's grandson. Shaurya is Anchal's son. Thus, Shaurya and Karan are cousins.

Question 8

If 'p + q' implies 'p - q', 'p - q' implies 'p × q', 'p × q' implies 'p ÷ q' and 'p ÷ q' implies 'p + q', then find the value of 25 + 48 × 6 ÷ 12 - 2.

Accepted Answer

Substitute the given symbols: + becomes -, × becomes ÷, ÷ becomes +, - becomes ×. The expression becomes 25 - 48 ÷ 6 + 12 × 2. Following BODMAS, calculate 25 - 8 + 24 = 41.

Question 9

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the odd one.

Accepted Answer

In options 1, 2, and 3, the first two letters are consecutive and in reverse alphabetical order (H-G, F-E, B-A). The last two letters are also consecutive and in reverse alphabetical order (S-T, U-V, Y-Z). Option 4 (DCWV) breaks this pattern as C-W are not consecutive.

Question 10

'Little knowledge is a dangerous thing' is a decision based on:

Accepted Answer

The proverb 'Little knowledge is a dangerous thing' means that having incomplete information can lead to harmful outcomes. Option 4 directly reflects this meaning.

Question 11

If the letters of the word ADISNHPANRKARFACHTARKYAR were written in reverse order, then which would be the third letter to the right of the ninth letter from the left?

Accepted Answer

Reverse the word to RAYKRATHCAFRANKAPHSINDA. The ninth letter from the left is 'A'. The third letter to its right is 'R'.

Question 12

P is the brother of Q and R. S is R’s mother. T is P’s father. Which of the following statements CANNOT be definitely true?

Accepted Answer

P, Q, R are siblings. S is R's mother, so S is also P's and Q's mother. T is P's father. Thus, T is the father of P, Q, R and husband of S. T cannot be Q's husband.

Question 13

Select the numbers from among the given options that can replace the question mark (?) in the following series.4, 11, 30, 67, 128, ?

Accepted Answer

The pattern is n³ + 3. For n=1, 1³+3=4; for n=2, 2³+3=11; for n=3, 3³+3=30; for n=4, 4³+3=67; for n=5, 5³+3=128. So for n=6, 6³+3 = 216+3 = 219.

Question 14

Select the ordered pair of statements which are logically consistent with the main statement.Main Statement:Whenever Sakshi hears it's someone's birthday, she orders a cake.A. Sakshi heard of someone's birthday.B. Sakshi did not hear of someone's birthday.C. Sakshi ordered a cake.D. Sakshi did not ordered a cake.

Accepted Answer

The main statement is 'If Sakshi hears it's someone's birthday (P), then she orders a cake (Q)'. The contrapositive (not Q implies not P) is logically consistent. If Sakshi did not order a cake (D), then she did not hear of a birthday (B).

Question 15

Study the following figure and answer the given question.Which region represents students who are musicians but NOT players?

Accepted Answer

Identify the region common to 'Students' and 'Musicians' but outside 'Players'. Region Q fits this description perfectly, representing students who are musicians but not players.

Question 16

In a class of 36 students, the number of boys are twice the number of girls. In the class, there are 13 boys before Reema (girl) whose position is 19thin the class. How many girls are there in the class after Reema?

Accepted Answer

Total girls = 36/3 = 12. Reema is 19th. Before Reema: 13 boys, so 19 - 13 - 1 (Reema) = 5 girls. Girls after Reema = 12 - 5 - 1 = 6.

Question 17

Four different positions of a cube are shown in the figure. Which of the following colours is on the face opposite to the face that has black written on it?

Accepted Answer

From the given positions, Black is adjacent to Pink, Blue, Purple, and Red. Since only one face can be opposite, Orange must be opposite to Black.

Question 18

Four numbers have been given, out which three are alike in some manner and one is different. select the number that is different from the rest.

Accepted Answer

The numbers 35 (5x7) and 39 (3x13) are composite numbers. 37 is a prime number. 41 is also a prime number. The question asks to select the number that is different from the rest. The correct answer is 41.

Question 19

In a certain code language, PENINSULA is written as 111. How will DICHOTOMY be written as in that language?

Accepted Answer

Assign A=1, B=2... Sum the position values of consonants and vowels separately. PENINSULA: Consonants (P+N+N+S+L) = 16+14+14+19+12 = 75. Vowels (E+I+U+A) = 5+9+21+1 = 36. Concatenate these sums: 7536. Sum of digits of 7536 = 7+5+3+6 = 21. Multiply by 5 + 6 = 111. DICHOTOMY: Consonants (D+C+H+T+M+Y) = 4+3+8+20+13+25 = 73. Vowels (I+O+O) = 9+15+15 = 39. Concatenate: 7339. Sum of digits of 7339 = 7+3+3+9 = 22. Multiply by 5 + 2 = 112.

Question 20

Two different positions of the same dice are shown. Select the number that will be on the face opposite to that of number 5.

Accepted Answer

Identify common numbers (3 and 1) in both dice. The remaining numbers on the visible faces (5 and 4) must be opposite to each other. Thus, 4 is opposite 5.