SSC CGL Undated PYQs

Question 1

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?

Accepted Answer

When x + (1/x) = 2, the only possible value for x is 1. Substituting x = 1 into the expression gives 1^21 + 1/(1^1331) = 1 + 1 = 2.

Question 2

Improve the bracketed part of the sentence. She did not like to have coffee (nor I did).

Accepted Answer

When 'nor' is used to introduce a negative statement following another negative statement, it requires inversion of the auxiliary verb and subject. Thus, 'nor did I' is correct.

Question 3

Sardar Vallabhbai Patel was the leader of _______.

Accepted Answer

Sardar Vallabhbhai Patel led the Bardoli Satyagraha in 1928, a major peasant movement in Gujarat against unjust tax hikes. This success earned him the title 'Sardar'.

Question 4

A person lent certain sum of money at 10% per annum simple interest. In 20 years the interest amounted to Rs 500 more than the sum lent. What was the sum lent (in Rs)?

Accepted Answer

Let the principal be P. Simple interest for 20 years at 10% is (P × 10 × 20)/100 = 2P. Given 2P = P + 500, solving this gives P = 500.

Question 5

Who discovered Photon?

Accepted Answer

Albert Einstein introduced the concept of the photon in 1905 to explain the photoelectric effect, proposing that light consists of discrete energy packets or quanta.

Question 6

What is the full form of DNA?

Accepted Answer

DNA stands for Deoxyribonucleic acid. It is the complex molecule that carries genetic information for the development and functioning of an organism.

Question 7

A dealer sells a machine having marked price as Rs 3840 at a discount of 20%. What is the selling price (in Rs) of the machine?

Accepted Answer

The selling price is 80% of the marked price after a 20% discount. Calculate 80% of 3840: 0.8 × 3840 = 3072. Thus, the selling price is Rs 3072.

Question 8

Improve the bracketed part of the sentence. We (are looking forward for) a positive response from you.

Accepted Answer

The correct idiomatic expression is 'look forward to', which means to anticipate something with pleasure. 'For' is incorrect in this context.

Question 9

In stems, the protoxylem lies towards the centre and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called _____________.

Accepted Answer

In stems, when the protoxylem is at the center and metaxylem is at the periphery, the arrangement is called endarch. Exarch is the opposite arrangement found in roots.

Question 10

The final of 2014 FIFA Men's World Cup was played between which of the following countries?

Accepted Answer

The 2014 FIFA Men's World Cup final was held in Brazil, where Germany defeated Argentina 1-0 after extra time, thanks to Mario Götze's winning goal.

Question 11

Alveoli is related to which of the following system of human body?

Accepted Answer

Alveoli are tiny balloon-like air sacs located in the lungs. They are a crucial part of the respiratory system, facilitating the exchange of oxygen and carbon dioxide with the blood.

Question 12

When a number is increased by 120, it becomes 130% of itself. What is the number?

Accepted Answer

Let the number be x. Increasing it by 120 makes it 130% of x. So, 30% of x equals 120. Solving for x gives (120/30) * 100 = 400.

Question 13

If a + b = 10 and ab = 24, then what is the value of a3 + b3?

Accepted Answer

Use the algebraic identity a³ + b³ = (a+b)³ - 3ab(a+b). Substitute the given values: 10³ - 3(24)(10) = 1000 - 720 = 280.

Question 14

Which queen of the Kakatiya dynasty ruled over Warangal, part of modern Andhra Pradesh?

Accepted Answer

Rani Rudramadevi was a prominent monarch of the Kakatiya dynasty in the Deccan Plateau, ruling from Warangal (1263–1289 CE). She was one of the few ruling queens in Indian history.

Question 15

Who discovered X-rays?

Accepted Answer

Wilhelm Conrad Roentgen, a German physicist, discovered X-rays in 1895 while experimenting with cathode rays. He received the first Nobel Prize in Physics in 1901 for this groundbreaking discovery.

Question 16

Which of the following disease is caused by female Anopheles mosquito?

Accepted Answer

Malaria is caused by the Plasmodium parasite, which is transmitted to humans primarily through the bites of infected female Anopheles mosquitoes.

Question 17

Improve the bracketed part of the sentence. He thanked me for what I (have done) for his wife.

Accepted Answer

The main verb 'thanked' is in the simple past. The action of 'doing' for his wife happened before he thanked, requiring the past perfect tense 'had done'.

Question 18

If the force applied on the object is in the direction opposite to the direction of motion, the speed of the object __________.

Accepted Answer

According to Newton's laws, a force applied opposite to the direction of motion causes negative acceleration (deceleration), which gradually reduces the object's speed.

Question 19

If a saree is sold for Rs 2880 the seller will face 10% loss, at what price (in Rs) should he sell to gain 20% profit?

Accepted Answer

Selling price at 10% loss is 90% of CP. So, CP = 2880 / 0.9 = Rs 3200. To gain 20%, new SP = 3200 × 1.2 = Rs 3840.

Question 20

The laws which govern the motion of planets are called ___________________.

Accepted Answer

Johannes Kepler formulated three laws of planetary motion that describe the orbits of planets around the Sun, including the laws of ellipses, equal areas, and harmonies.