SSC CGL Undated PYQs

Question 1

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 2

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 3

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 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

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 12

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 13

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 14

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.

Question 15

If -3[1-(x/2)] + 5x/3 = 1/6, then what is the value of x?

Accepted Answer

Expand the equation to -3 + 3x/2 + 5x/3 = 1/6. Multiply the entire equation by 6 to get -18 + 9x + 10x = 1. Solving gives 19x = 19, so x = 1.

Question 16

Who has built the Vijay Stambha (Tower of Victory) in Chittorgarh?

Accepted Answer

Rana Kumbha built the Vijay Stambha in 1448 to commemorate his victory over the combined armies of Malwa and Gujarat led by Mahmud Khilji.

Question 17

Which of the following carries oxygen to various parts of human body?

Accepted Answer

Red blood cells contain hemoglobin, a protein that binds to oxygen in the lungs and transports it through the bloodstream to all tissues and organs in the human body.

Question 18

Select the related letters from the given alternatives. DFI : ACF :: OQT : ?

Accepted Answer

Each letter in the first term is shifted backward by 3 positions to get the second term (D-3=A, F-3=C, I-3=F). Applying this to OQT: O-3=L, Q-3=N, T-3=Q, giving LNQ.

Question 19

What is the fourth proportional to 24, 120 and 22?

Accepted Answer

Let the fourth proportional be x. The proportion is 24 : 120 :: 22 : x. Solving for x gives x = (120 × 22) / 24 = 5 × 22 = 110.

Question 20

Which among the following is a 'Modifier key'?

Accepted Answer

A modifier key temporarily modifies the normal action of another key when pressed together. Control, Shift, and Alt are all standard modifier keys on a computer keyboard.