SSC CGL Undated PYQs

Question 1

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 2

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 3

What is the full form of ISDN? 9/7/2017 Staff Selection Commision http://thepracticetest.in/cs_cglet1_17/response_questions.php?t_id=MTIwODIwMTc=&appid=1368062d74107fc05177712c90c3885c 14/28

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 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

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 12

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 13

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 14

Mr. Raghav taught Geometry for 36 hours. If the time taken in teaching Ratio consitutes one-fourth of the time for Arithmetic, then for how much time (in hours) did he taught the topic of Ratio?

Accepted Answer

Based on the associated data chart (not shown), find the total time using Geometry's 36 hours. Then calculate Arithmetic's time and divide it by 4 to get 69 hours for Ratio.

Question 15

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 16

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 17

In a row, there are 6 boys between A and B and A being the first boy in row. There are 3 boys between B and C. If there are 12 boys after C, then how many minimum boys are there in the row?

Accepted Answer

A is 1st. 6 boys between A and B makes B the 8th boy. 3 boys between B and C makes C the 12th boy. 12 boys after C means 12 + 12 = 24 boys total.

Question 18

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

The population of the 6 cities are 250000, 200000, 220000, 300000, 150000 and 400000 respectively. Which is the correct order of the number of literate people in these cities? ?

Accepted Answer

Calculate the number of literate people for each city by multiplying its population by its respective literacy rate (from the given data chart), then arrange them in descending order.