RRB NTPC 2020 PYQs

Question 1

Who was the founder of the Vishishtadvaita philosophy?

Accepted Answer

Ramanujacharya is credited with founding the Vishishtadvaita school of Hindu philosophy, emphasizing qualified non-dualism.

Question 2

In ΔABC, ∠A = 90°, AB = 6 cm and AC = 8 cm. If AD is perpendicular to BC, the AD is equal to:

Accepted Answer

First, find BC using Pythagoras theorem (10 cm). Then, equate the area of the triangle calculated in two ways: (1/2) * AB * AC = (1/2) * BC * AD. Solve for AD.

Question 3

If‌x2+‌2y=1and‌y2+‌2z=1, then the value of‌z2+‌2xis:

Accepted Answer

By substituting x=1, y=0, and z=0 into the given equations, we find that both equations are satisfied. Therefore, substituting these values into the expression z²+2x gives 0²+2(1) = 2.

Question 4

The capacity of working by A and B is in the ratio 3 : 4. If A takes 12 days to finish the work, the time taken by B to finish the same work is:

Accepted Answer

Efficiency and time are inversely proportional. If A:B efficiency is 3:4, then time taken will be 4:3. So, 4 units = 12 days, 1 unit = 3 days. B takes 3 units = 9 days.

Question 5

Which famous author used the pen name Madhavikutty?

Accepted Answer

Kamala Das, a renowned Indian English and Malayalam author, famously used the pen name Madhavikutty for her Malayalam writings. This is a direct factual recall.

Question 6

As of November 2020, Who is the Education minister of India?

Accepted Answer

As of November 2020, Dr. Ramesh Pokhriyal 'Nishank' was the Union Minister of Education. This is a direct factual recall question.

Question 7

'Operation Greens' is a government scheme for:

Accepted Answer

Operation Greens aims to stabilize the supply and prices of Tomato, Onion, and Potato (TOP) crops, reducing post-harvest losses and ensuring better returns for farmers.

Question 8

When the integer m is divided by 8, the remainder is 5. What is the remainder if 7m is divided by 8?

Accepted Answer

Given m leaves a remainder of 5 when divided by 8. So, m can be written as 8k + 5. Then 7m = 7(8k + 5) = 56k + 35. Dividing 35 by 8 gives a remainder of 3. Thus, 7m divided by 8 leaves a remainder of 3.

Question 9

Where is the Central Potato Research Institute of India located?

Accepted Answer

The Central Potato Research Institute (CPRI) is located in Shimla, Himachal Pradesh. It was established in 1949.

Question 10

Of the 360 students who sat for Class X Board exams, 10% students scored A grade, 20% students scored B grade, 30% students scored C grade and 40% scored D grade. From the given pie chart, find the total number of students who scored Grade A and Grade B.

Accepted Answer

Total students are 360. Grade A students are 10% of 360 = 36. Grade B students are 20% of 360 = 72. Total A and B grade students = 36 + 72 = 108.

Question 11

Bella is taller than Shubham. Umesh is taller than Shubham but shorter than Bella. Salman is shorter than Rahul and Shubham. Shubham is taller than Rahul. Who is the shortest in the group?

Accepted Answer

Establish the height order: Bella > Umesh > Shubham > Rahul > Salman. Salman is shorter than both Rahul and Shubham, making him the shortest.

Question 12

'Antrix Corporation Limited, Bengaluru' is a

Accepted Answer

Antrix Corporation Limited is the commercial arm of the Indian Space Research Organisation (ISRO). It markets ISRO's products and services globally.

Question 13

Which of the following is the assumption for the claim that 'Pleasure is desirable'?

Accepted Answer

For pleasure to be 'desirable' in a general sense, it must be something universally sought. If everyone desires pleasure, then it is inherently desirable.

Question 14

When was the Dowry Prohibition Act commenced?

Accepted Answer

The Dowry Prohibition Act was enacted in 1961. This legislation aims to prevent the practice of giving or taking dowry.

Question 15

In which year did ISRO launch the Mars Orbiter Mission?

Accepted Answer

The Mars Orbiter Mission (MOM), also known as Mangalyaan, was successfully launched by ISRO on November 5, 2013.

Question 16

If x = a sin t, y = b tan t, then‌a2x2−‌b2y2is:

Accepted Answer

Substitute x and y values into the expression. We get 1/sin²t - 1/tan²t. This simplifies to cosec²t - cot²t, which is a fundamental trigonometric identity equal to 1.

Question 17

What is the name of the Societal movement launched by the Union Minister of Environment, forest and climate change?

Accepted Answer

The Union Minister of Environment, Forest and Climate Change launched the 'Green Good Deeds' movement to promote environmental protection and sustainable living among citizens.

Question 18

Select the number from among the given that can replace the question mark(?) in the following series.1, 27, 125, 343.?

Accepted Answer

The series consists of cubes of consecutive odd numbers: 1³=1, 3³=27, 5³=125, 7³=343. The next odd number is 9, so 9³=729.

Question 19

Which is the first nuclear reactor made in India?

Accepted Answer

Apsara was India's first nuclear research reactor, commissioned in 1956. It was built with assistance from the United Kingdom.

Question 20

Simplify: 245 - [135 - {84 ÷ 4 of 3 - (11 - 12 ÷ 3)}]

Accepted Answer

Follow BODMAS: first solve innermost parentheses (11 - 4 = 7), then 'of' (4 of 3 = 12), then division (84 ÷ 12 = 7). Next, subtract (7 - 7 = 0). Finally, 245 - [135 - 0] = 245 - 135 = 110.