SSC CGL Undated PYQs

Question 1

A, B and C can ﬁnish a job working alone in 12, 8 and 24 days respectively. In how many days they can ﬁnish the job if they worked together?

Accepted Answer

Total work is LCM(12, 8, 24) = 24 units. Daily efficiencies are A=2, B=3, C=1. Total efficiency = 6 units/day. Time taken together = 24 / 6 = 4 days.

Question 2

Who was given the title of "The Ambassador of Hindu – Muslim Unity" for being the architect and mastermind of the historic Lucknow Pact?

Accepted Answer

Sarojini Naidu gave Muhammad Ali Jinnah the title "Ambassador of Hindu-Muslim Unity" for his crucial role in drafting the 1916 Lucknow Pact, uniting the Congress and Muslim League.

Question 3

In which year (in AD) was the East India Company established?

Accepted Answer

The English East India Company was established on December 31, 1600, by a royal charter from Queen Elizabeth I, granting it a monopoly on trade with the East.

Question 4

Oxide of which of the following will turn red litmus blue?

Accepted Answer

Metal oxides are basic in nature, so they turn red litmus blue. Magnesium is a metal, whereas phosphorus, sulphur, and carbon are non-metals that form acidic oxides.

Question 5

If the speed of an object moving along a straight line keeps changing, its motion is said to be _________.

Accepted Answer

When an object's speed changes over time while moving in a straight line, it covers unequal distances in equal time intervals, which defines non-uniform motion.

Question 6

How does a Unicellular Organism reproduce?

Accepted Answer

Unicellular organisms, like amoeba and bacteria, reproduce primarily through cell division (binary fission), where a single parent cell divides into two identical daughter cells.

Question 7

A trader sold an article at profit of 20%. Had he bought that article at 60% less price and sold it at Rs 90 less, then he would have gained 50%. What is the value (in Rs) of cost price?

Accepted Answer

Let CP = 100x, so SP = 120x. New CP = 40x. New SP with 50% profit = 40x + 20x = 60x. Difference in SP = 120x - 60x = 60x = 90. Thus, x = 1.5 and CP = 150.

Question 8

If 26#14=80; 5#3=16; 6#5=22; then what is the value of 14#5=?

Accepted Answer

The pattern is (A + B) × 2. For 14#5, add 14 and 5 to get 19, then multiply by 2 to get 38.

Question 9

Metals react with sodium hydroxide to produce ___________.

Accepted Answer

Reactive metals like zinc and aluminum react with strong bases like sodium hydroxide to form complex salts (e.g., sodium zincate) and release hydrogen gas.

Question 10

If Sec θ = 13/12, then what is the value of Sin θ?

Accepted Answer

Sec θ = Hypotenuse/Base = 13/12. By Pythagoras theorem, Perpendicular = √(13² - 12²) = √25 = 5. Therefore, Sin θ = Perpendicular/Hypotenuse = 5/13.

Question 11

What is the full form of ISDN?

Accepted Answer

ISDN stands for Integrated Services Digital Network. It is a set of communication standards for the simultaneous digital transmission of voice, video, and data over traditional circuits.

Question 12

Courier service comes under which sector?

Accepted Answer

The tertiary sector involves providing services rather than producing goods. Courier services facilitate transportation and delivery, making them a classic example of the tertiary or service sector.

Question 13

For an article the proﬁt is 170% of the cost price. If the cost price increases by 20% but the selling price remains same, then what is the new proﬁt percentage?

Accepted Answer

Let CP = 100, so Profit = 170 and SP = 270. New CP = 120, SP remains 270. New profit = 150. Profit % = (150/120) × 100 = 125%.

Question 14

Improve the bracketed part of the sentence. The doctor (has advice) him to take proper diet.

Accepted Answer

The verb 'advice' is a noun. The sentence requires a verb in the present perfect tense, which is 'has advised'. This corrects the grammatical error.

Question 15

ΔABC is similar to ΔPQR. If ratio of perimeter of ΔABC : perimeter of ΔPQR is 5:9 and if PQ = 45 cm, then the length of AB (in cm) is?

Accepted Answer

For similar triangles, the ratio of perimeters equals the ratio of corresponding sides. So, AB/PQ = 5/9. Given PQ = 45, AB = (5/9) × 45 = 25 cm.

Question 16

What is the value of 10% of 150% of 400?

Accepted Answer

Calculate step-by-step: First, find 150% of 400, which is (150/100) × 400 = 600. Then, find 10% of that result: (10/100) × 600 = 60.

Question 17

15% of total time is spent on quality check and this time is equally taken from all other processes. So What will be the new sectorial angle (in degrees) made by total time of seats and glass?

Accepted Answer

The 15% quality check time is deducted equally from other processes. Subtracting their share from the original combined percentage of seats and glass leaves 9%, which is 9% of 360° = 32.4°.

Question 18

If each taxi on an average runs 100 kms every day and if fuel cost is Rs 3 per km, then all these taxis spend how much (in Rs.) on fuel every day?

Accepted Answer

Assuming from the DI context that total taxis = 360. Daily cost per taxi = 100 km × ₹3/km = ₹300. Total daily fuel cost = 360 × 300 = ₹1,08,000.

Question 19

If Cot θ = 24/7, then Sin θ = ?

Accepted Answer

Cot θ = Base/Perpendicular = 24/7. By Pythagoras theorem, Hypotenuse = √(24² + 7²) = √625 = 25. Sin θ = Perpendicular/Hypotenuse = 7/25.

Question 20

Earth's Deepest point in water is Mariana trench. It is located in which of the following oceans?

Accepted Answer

The Mariana Trench is the deepest oceanic trench on Earth, located in the western Pacific Ocean. Its maximum known depth is the Challenger Deep.