SSC CGL Undated PYQs

Question 1

If "–" means "divided by", "+" means "multiplied by", "÷" means "added to", "x" means "subtracted from", then 11 ÷ 6 – 2 + 5 x 3 = ?

Accepted Answer

Replace the symbols according to the rules: 11 + 6 ÷ 2 × 5 - 3. Using BODMAS, first divide (6÷2=3), then multiply (3×5=15), then add and subtract: 11 + 15 - 3 = 23.

Question 2

A can paint a house in 42 days and B can do it in 21 days. Along with C, they can finish the job in 7 days only.C alone can do the painting job in how many days, ?

Accepted Answer

Total work = LCM(42, 21, 7) = 42 units. Efficiencies: A = 1, B = 2, A+B+C = 6. C's efficiency = 6 - (1+2) = 3. C alone takes 42/3 = 14 days.

Question 3

Point P (8 , 5) is the midpoint of segment AB. Co-ordinates of A are (5, y) and B are (x, -3). What is the value of x?

Accepted Answer

Using the midpoint formula, the x-coordinate of the midpoint is the average of the endpoints' x-coordinates. So, 8 = (5 + x) / 2, which gives 16 = 5 + x, hence x = 11.

Question 4

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?

Accepted Answer

Multiply the equation by 3 to get 2(4x/5 - 3/4) - 5 = -1/2. Add 5 to get 9/2. Divide by 2, add 3/4, yielding 4x/5 = 3. Thus, x = 15/4.

Question 5

What is the slope of the line parallel to the line passing through the points (3 , -4) and (-2 , 5)?

Accepted Answer

The slope of the line through (3, -4) and (-2, 5) is (5 - (-4)) / (-2 - 3) = 9 / -5 = -9/5. Parallel lines have equal slopes.

Question 6

Which of the following micro-organism causes diseases like polio and chicken pox?

Accepted Answer

Polio and chicken pox are highly contagious viral infections. Polio is caused by the poliovirus, while chicken pox is caused by the varicella-zoster virus.

Question 7

In the following questions, the sentence given with blank to be ﬁlled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option. Education is for life, not merely for a livelihood. As long as we are unmindful of this _____, the _____ of our educational curriculum as well as that of our _____ and students is likely to remain _____. It is not enough for a society to have experts. It needs human beings who can think, feel and act generously, the kind of people who cannot be replaced by computers and _____. As long as we are unmindful of this _____,

Accepted Answer

The sentence discusses a fundamental principle about education's purpose. 'Truth' best fits the context of an underlying reality or principle that people are unmindful of, making it the most appropriate choice.

Question 8

Sexual reproduction in Algae that takes place through fusion of two similar size gametes is called?

Accepted Answer

The prefix 'iso' means equal. When two gametes of similar size and shape fuse during sexual reproduction in algae, it is termed isogamous reproduction.

Question 9

Acetic Acid is another name for which of the following?

Accepted Answer

Vinegar is an aqueous solution consisting mainly of acetic acid (CH3COOH) and water. It typically contains 5-8% acetic acid by volume, making it the primary active component.

Question 10

What is nature of pH of Milk?

Accepted Answer

The pH of milk typically ranges from 6.5 to 6.7, making it slightly acidic. This slight acidity is primarily due to the presence of lactic acid.

Question 11

Select the related word from the given alternatives. Ice : Cold :: Steam : ?

Accepted Answer

Ice is inherently cold; coldness is its primary defining characteristic. Similarly, steam is inherently hot. Therefore, 'Hot' correctly completes the analogy based on the physical property of the substance.

Question 12

If the 1st and the 3rd term of an arithmetic progression are -10 and -4, what is the 12th term?

Accepted Answer

First term a = -10. Third term a + 2d = -4, so 2d = 6, giving common difference d = 3. The 12th term is a + 11d = -10 + 33 = 23.

Question 13

Which of the following right has been removed from fundamental rights and converted to a simple legal right?

Accepted Answer

The Right to Property was removed from the list of Fundamental Rights by the 44th Amendment Act, 1978. It is now a legal right under Article 300A of the Constitution.

Question 14

Δ LMN is right angled at M. If m ∠N = 45o. What is the length (in cm) of MN, if NL = 6√2 cm?

Accepted Answer

In right-angled ΔLMN, cos(45°) = base/hypotenuse = MN/NL. So, 1/√2 = MN / 6√2. Solving this gives MN = 6 cm.

Question 15

To cover a distance of 144 km in 3.2 hours what should be the average speed of the car in meters/second?

Accepted Answer

Speed = Distance / Time = 144 / 3.2 = 45 km/h. To convert to m/s, multiply by 5/18. So, 45 × (5/18) = 12.5 m/s.

Question 16

In the following question, select the related letters from the given alternatives. JKLM : IIII : : PQRS : ?

Accepted Answer

Subtract 1, 2, 3, and 4 from the positional values of J, K, L, and M respectively to get IIII. Applying the same to PQRS gives OOOO.

Question 17

In the following question, four words are given out of which one word is incorrectly spelt. Select the incorrectly spelt word.

Accepted Answer

The word 'Hypocracy' is incorrectly spelled. The correct spelling is 'Hypocrisy'. The other words are spelled correctly.

Question 18

The substances which reduce friction are called _________.

Accepted Answer

Lubricants, such as oil or grease, form a thin layer between moving surfaces, filling microscopic irregularities and significantly reducing friction and wear.

Question 19

Which of the following is not a component of Smog?

Accepted Answer

Smog is primarily composed of ozone, nitrogen oxides, sulphur dioxide, and volatile organic compounds. Chlorine oxide is not a typical component of smog; it is mainly involved in ozone depletion.

Question 20

A _______ is a collection of letters, digits, punctuation characters, and so on.

Accepted Answer

In programming, a string is a data type used to represent text. It is a sequence of characters that can include letters, numbers, and punctuation marks.