SSC CGL Undated PYQs

Question 1

Which Vitamin is obtained from Sun rays? ?

Accepted Answer

Vitamin D is synthesized in the skin when exposed to sunlight, specifically UVB rays. It helps the body absorb calcium, promoting healthy bones and teeth.

Question 2

If 8x/3 + [7(5 - 2x/3)]/2 = 1/2 , then what is the value of x?

Accepted Answer

Multiply the entire equation by 6 to eliminate fractions. This gives 16x + 105 - 14x = 3. Simplifying yields 2x = -102, so x = -51.

Question 3

In the names Mangifera indica (mango), Solanum tuberosum (potato) and Panthera leo (lion), what does the three names, indica, tuberosum and leo, represent?

Accepted Answer

In binomial nomenclature, a scientific name has two parts. The first is the genus, and the second word (indica, tuberosum, leo) is the specific epithet denoting the species.

Question 4

The boundary between Earth's crust and mantle is _____.

Accepted Answer

The Mohorovičić (Moho) discontinuity is the boundary that separates the Earth's crust from the underlying mantle. Gutenberg separates the mantle and core.

Question 5

A can complete a work in 20 days and B can complete the same work in 25 days. If both of them work together, then in 3 days what percent of the total work will be completed?

Accepted Answer

Let total work be LCM(20, 25) = 100 units. A's efficiency is 5, B's is 4. Together they do 9 units/day. In 3 days, they complete 27 units, which is 27%.

Question 6

___________ is the process of restoring a forest that once existed but was removed at some point of time in the past.

Accepted Answer

Reforestation is the replanting of trees in an area where a forest was previously depleted or destroyed, helping to restore the natural ecosystem.

Question 7

To whom the Nobel Prize in Physiology or Medicine 2016 was awarded?

Accepted Answer

Yoshinori Ohsumi was awarded the 2016 Nobel Prize in Physiology or Medicine for his discoveries of mechanisms for autophagy, the fundamental process for degrading and recycling cellular components.

Question 8

Union Cabinet approves amendments in M-SIPS to attract investment in electronics manufacturing. What is the full form of M-SIPS?

Accepted Answer

M-SIPS stands for Modified Special Incentive Package Scheme. It was launched by the Indian government to promote large-scale electronics manufacturing by providing financial incentives to attract investments.

Question 9

If a3 + b3 = 28 and a + b = 4, then what is the value of ab?

Accepted Answer

Use the formula a³ + b³ = (a+b)((a+b)² - 3ab). Substituting the values gives 28 = 4(16 - 3ab). Solving this yields 7 = 16 - 3ab, so 3ab = 9, which means ab = 3.

Question 10

A non-zero number is greater than 7 times its reciprocal by 9.3. What is the number?

Accepted Answer

Let the number be x. The equation is x - 7/x = 9.3. Testing option 1 (x=10) gives 10 - 7/10 = 10 - 0.7 = 9.3, which satisfies the condition.

Question 11

What was invented by J. B. Dunlop? 9/8/2017 Staff Selection Commision http://thepracticetest.in/cs_cglet1_17/response_questions.php?t_id=MTIwODIwMTc=&appid=1368062d74107fc05177712c90c3885c# 18/32

Accepted Answer

John Boyd Dunlop, a Scottish inventor, is credited with inventing the first practical pneumatic (inflatable) rubber tyre in 1887, originally for his son's tricycle.

Question 12

If BOULDER is coded as ZMSJBCP, then how will ELK be coded as? 9/7/2017 Staff Selection Commision

Accepted Answer

Each letter in the word is shifted backward by 2 positions in the English alphabet. Applying -2 to E, L, and K gives C, J, and I respectively.

Question 13

If x = 1 – y and x2 = 2 – y2, then what is the value of xy?

Accepted Answer

Rearrange to x + y = 1 and x² + y² = 2. Using the identity (x+y)² = x² + y² + 2xy, we get 1² = 2 + 2xy. Solving gives 2xy = -1, so xy = -1/2.

Question 14

07/09/2017 Staff Selection Commision http://thepracticetest.in/cs_cglet1_17/response_questions.php?t_id=MTcwODIwMTc=&appid=1368062d74107fc05177712c90c3885c 11/25

Accepted Answer

In this matrix coding question, check the row and column numbers for each letter. Option 3 correctly represents all the letters of the given word.

Question 15

How many numbers are there between 1 to 200 which are divisible by 3 but not by 7?

Accepted Answer

Find numbers divisible by 3: 200/3 = 66. Then find numbers divisible by both 3 and 7 (LCM = 21): 200/21 = 9. Subtract them: 66 - 9 = 57.

Question 16

Select the related number from the given alternatives. 12.5 : 6.25 :: 7 : ? 12.5 : 6.25 :: 7 : ?

Accepted Answer

The pattern is dividing the first number by 2 to get the second number. 12.5 ÷ 2 = 6.25. Similarly, 7 ÷ 2 = 3.5.

Question 17

A boat goes 4 km upstream and 4 km downstream in 1 hour. The same boat goes 5 km downstream and 3 km upstream in 55 minutes. What is the speed (in km/hr) of boat in still water?

Accepted Answer

Let upstream speed be U and downstream be D. 4/U + 4/D = 1 and 3/U + 5/D = 11/12. Solving gives D = 12, U = 6. Boat speed = (12+6)/2 = 9 km/hr.

Question 18

In April 2016, amid rising tension over North Korea, which country launched its ﬁrst domestically built aircraft carrier?

Accepted Answer

In April 2016, China launched its first domestically built aircraft carrier, the Type 001A (later named Shandong), amidst regional tensions involving North Korea.

Question 19

China does not share its border with which Indian state?

Accepted Answer

China shares its borders with Ladakh, Himachal Pradesh, Uttarakhand, Sikkim, and Arunachal Pradesh. Bihar shares its international border only with Nepal, not China, making it the correct answer.

Question 20

A trader had 1200 kgs of rice. He sold a part of it at 5% proﬁt and the rest at 11% proﬁt, so that he made a total proﬁt of 7%. How much (in kg) wheat did he sell at 5% proﬁt?

Accepted Answer

Using alligation, the ratio of quantities sold at 5% and 11% is (11 - 7) : (7 - 5) = 4 : 2 = 2 : 1. Quantity at 5% = (2/3) × 1200 = 800 kg.