SSC CGL Undated PYQs

Question 1

The Patkai hills belong to which mountain ranges?

Accepted Answer

The Patkai hills are located on India's north-eastern border with Myanmar. They are a part of the Purvanchal range, which forms the eastern extension of the Himalayas.

Question 2

Which of the statements given below are correct? 1. The author of the novel 'Half of a Yellow Sun' is Chimamanda Ngozi Adichie. 2. The author of the novel 'Middlesex' is Jeffrey Eugenides. 3. The author of the novel 'Missile Gap' is China Mieville.

Accepted Answer

Statements 1 and 2 are correct. However, statement 3 is incorrect because the novella 'Missile Gap' was written by Charles Stross, not China Mieville.

Question 3

If 15@7=44; 5@4=18; 6@17=46; then what is the value of 17@4=?

Accepted Answer

The pattern follows the rule a@b = 2(a + b). Therefore, for 17@4, we calculate 2 × (17 + 4) = 2 × 21 = 42.

Question 4

______ Disk Encryption is a technology (hardware or software) where data is encrypted before storage.

Accepted Answer

Whole Disk Encryption (WDE) or Full Disk Encryption protects the entire volume, ensuring all data, including the operating system, is encrypted before being saved to the storage drive.

Question 5

If 5 # 9 @ 7 = 52 and 3 @ 9 # 2 = – 89, then 7 # 6 @ 9 = ?

Accepted Answer

The symbol '#' combines the digits and '@' means subtraction. So, 59 - 7 = 52 and 3 - 92 = -89. Applying this, 76 - 9 = 67.

Question 6

Which colour is formed when Red and Green are mixed?

Accepted Answer

In the additive color model (like light), mixing the primary colors red and green produces yellow. This differs from mixing paints (subtractive), which would yield a brownish color.

Question 7

Which of the following is called GDP Deflator?

Accepted Answer

The GDP deflator measures inflation by comparing the current prices of all goods and services (nominal GDP) to base-year prices (real GDP). Formula: (Nominal GDP / Real GDP) × 100.

Question 8

Pearl Towers is taller than Sky Towers but shorter than Unity Towers. Unity Towers and Cyber Towers are of same height. Pearl Towers is shorter than Indus Towers. Amongst the buildings, who is the second shortest?

Accepted Answer

Based on the given information, the height order is Sky < Pearl < Unity = Cyber, and Pearl < Indus. Thus, Sky is the shortest and Pearl is the second shortest.

Question 9

What is the simpliﬁed value of (sin A – cosec A)(sec A – cos A) (tan A + cot A)?

Accepted Answer

Convert all terms to sin and cos: (-cos²A/sin A) × (sin²A/cos A) × (1/(sin A cos A)). Multiplying these gives -(sin²A cos²A)/(sin²A cos²A) = -1.

Question 10

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

Accepted Answer

Let the fraction be x/y. We have (x+5)/y = 6/5 and x/(y+4) = 1/2. Solving these gives y = 2x - 4. Substituting yields 7x = 49, so x = 7 and y = 10. The fraction is 7/10.

Question 11

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

Accepted Answer

Expand the bracket: 5(4x/5 - 4/3) = 4x - 20/3. Divide by 2 to get 2x - 10/3. The equation becomes 2x/3 - (2x - 10/3) = 1/3. Solving gives -4x/3 = -9/3, so x = 9/4.

Question 12

Process of gaining electrons is known as _____.

Accepted Answer

Reduction is the chemical process where an atom or ion gains electrons, decreasing its oxidation state. Conversely, oxidation is the loss of electrons (remember OIL RIG).

Question 13

Select the related word from the given alternatives. Cotton : White :: Coal : ?

Accepted Answer

Cotton is naturally white in color. Similarly, the natural color of coal is black. The relationship is strictly based on the object and its primary color.

Question 14

If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

Accepted Answer

A concave mirror forms enlarged and inverted real images when the object is placed beyond its focal point. Convex mirrors always form diminished, erect images.

Question 15

At which rate, Reserve Bank of India borrows money from commercial banks?

Accepted Answer

Reverse Repo Rate is the rate at which the RBI borrows funds from commercial banks. It is primarily used to control the money supply and absorb excess liquidity from the market.

Question 16

A person lent certain sum of money at 5% per annum simple interest and in 15 years the interest amounted to Rs 250 less than the sum lent. What was the sum lent (in Rs)?

Accepted Answer

Let the sum be P. Simple Interest = (P × 5 × 15) / 100 = 0.75P. Given, P - 0.75P = 250. So, 0.25P = 250, which gives P = 1000.

Question 17

The ratio of the present ages of Aman and Ankit is 2 : 1 and the sum of their present ages is 72 years. What will be the Aman's age (in years) after 6 years?

Accepted Answer

Ratio sum is 2+1 = 3 units. 3 units = 72, so 1 unit = 24. Aman's present age is 2 × 24 = 48. After 6 years, his age will be 48 + 6 = 54 years.

Question 18

A 7500 mile direct rail link was launched on 10 April 2017 between China and _____.

Accepted Answer

On April 10, 2017, the first direct freight train service was launched connecting Yiwu in China to London, Great Britain, covering a massive 7,500-mile journey.

Question 19

Priya got 9 marks more in History than what she got in Geography. Her history marks are 56% of the sum of her History and Geography marks. What are her Geography marks?

Accepted Answer

Let Geography marks be x. History marks = x + 9. Given: x + 9 = 0.56(2x + 9). Solving gives 0.12x = 3.96, so x = 33.

Question 20

A solid sphere of diameter 7 cm is cut into two equal halves. What will be the increase (in cm2) in the total surface area ?

Accepted Answer

Cutting a sphere creates two new circular faces. The increase in total surface area is exactly the area of these two circles: 2πr². With r=3.5, 2 × (22/7) × 3.5² = 77.