SSC CGL Undated PYQs

Question 1

A wholesaler sells a good to a retailer at a proﬁt of 5% and the retailer sells it to a customer at a proﬁt of 10%. If the customer pays Rs. 2,000, what had it cost (in Rs) the wholesaler?

Accepted Answer

Let the wholesaler's cost be x. The successive selling price is x × 1.05 × 1.10 = 2000. Solving this gives x = 2000 / 1.155, which is approximately 1731.6.

Question 2

In the following reaction, fill in the blank. Acid + Base → _______ + Water

Accepted Answer

This is a classic neutralization reaction. When an acid reacts with a base, they neutralize each other's properties to produce a salt and water as the final products.

Question 3

Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?

Accepted Answer

Carbon dioxide is a major greenhouse gas. It effectively absorbs infrared radiation emitted by the Earth and heat from the Sun, trapping it in the atmosphere and causing the greenhouse effect.

Question 4

Arrange the given words in the sequence in which they occur in the dictionary. 1. Effacers 2. Effacing 3. Effaceable 4. Effacements 5. Effacement 1. Effacers 2. Effacing 3. Effaceable 4. Effacements 5. Effacement

Accepted Answer

Compare the letters. 'Efface' is common in 1, 3, 4, and 5, while 2 has 'Effaci', making it last. Among the rest, 'a' comes first (3), then 'm' (5, 4), and 'r' (1). Thus, 3, 5, 4, 1, 2.

Question 5

The average of 3 consecutive even numbers is A. If next 5 even numbers are added, then what is the average of these 8 numbers?

Accepted Answer

In a series of consecutive even numbers, adding each new number increases the average by 1. Since 5 new even numbers are added, the average increases by 5. New average = A + 5.

Question 6

Who is the author of ‘The Windfall’?

Accepted Answer

'The Windfall' is a debut novel written by Diksha Basu, published in 2017. It humorously explores the life of a middle-class Delhi family that suddenly becomes wealthy.

Question 7

How many medals in all did India win at the Rio Olympics 2016?

Accepted Answer

India won exactly 2 medals at the 2016 Rio Olympics: a silver by P.V. Sindhu in badminton and a bronze by Sakshi Malik in wrestling.

Question 8

X and Y start from the same point. X walks 40 m north, then turns West and walks 80 m, then turns to his right and walks 50 m. At the same time, Y walks 90 m North. Where is Y now with respect to the position of X?

Accepted Answer

X's final position is 80m West and 90m (40+50) North of the start. Y is 90m North of the start. Therefore, Y is 80m East of X.

Question 9

What is the minimum distance (in metres) required to hear an echo?

Accepted Answer

To hear an echo, a minimum time gap of 0.1s is needed. At a sound speed of 344 m/s, the total distance is 34.4m, making the one-way distance approximately 17 metres.

Question 10

If a + b + c = 9 and ab + bc + ca = 18, then what is the value of a3 + b3 + c3 – 3abc?

Accepted Answer

Use the formula a³+b³+c³-3abc = (a+b+c)[(a+b+c)² - 3(ab+bc+ca)]. Substitute the given values: 9 × [9² - 3(18)] = 9 × [81 - 54] = 9 × 27 = 243.

Question 11

Noor Jahan was the wife of which Mughal emperor?

Accepted Answer

Noor Jahan, originally named Mehr-un-Nissa, was the twentieth and most beloved wife of the Mughal Emperor Jahangir. She wielded immense political power and influence during his reign.

Question 12

What is the value of sin (–π/3) + cos(–π/6)?

Accepted Answer

Using trigonometric identities, sin(-θ) = -sin(θ) and cos(-θ) = cos(θ). Thus, sin(-π/3) = -√3/2 and cos(-π/6) = √3/2. Their sum is -√3/2 + √3/2 = 0.

Question 13

What is the minimum age required to become vice-president of India?

Accepted Answer

According to Article 66 of the Indian Constitution, a candidate must be a citizen of India and have completed 35 years of age to be eligible for the Vice-President's office.

Question 14

Sum of twice a fraction and 3 times its reciprocal is 29/3. What is the fraction?

Accepted Answer

Let the fraction be x. The equation is 2x + 3/x = 29/3. Checking option 4 (9/2): 2(9/2) + 3(2/9) = 9 + 2/3 = 29/3. It satisfies the condition.

Question 15

A commodity market has a _________ structure, if there is one seller of the commodity, the commodity has no substitute, and entry into the industry by another firm is prevented.

Accepted Answer

A monopoly exists when a single seller controls the entire market for a unique product with no close substitutes, and high barriers prevent new competitors from entering.

Question 16

The distance between the points (2, 7) and (k, -5) is 13. What is the value of k?

Accepted Answer

Using the distance formula: (k - 2)² + (-5 - 7)² = 13². This gives (k - 2)² + 144 = 169, so (k - 2)² = 25. Thus, k - 2 = 5, meaning k = 7.

Question 17

At which of the following stadium Sachin Tendulkar scored his 100th international century?

Accepted Answer

Sachin Tendulkar scored his historic 100th international century against Bangladesh in March 2012 at the Sher-e-Bangla National Stadium in Mirpur, Dhaka.

Question 18

India's first official census operation was undertaken in which year?

Accepted Answer

The first complete and official census of India was conducted in 1881 under Lord Ripon. A partial, non-synchronous census had occurred earlier in 1872 under Lord Mayo.

Question 19

Which of the following won the Best Feature Film Award at the 64th National Film Awards held in the year 2017?

Accepted Answer

The Marathi film 'Kaasav', directed by Sumitra Bhave and Sunil Sukthankar, won the Best Feature Film at the 64th National Film Awards in 2017 for its environmental theme.

Question 20

The average product curve are inverse ____ shaped.

Accepted Answer

The average product (AP) curve initially rises, reaches a maximum, and then falls due to the law of variable proportions, making it an inverse U-shaped curve.