SSC CGL Undated PYQs

Question 1

If the total trade of the country in year 3 was 1183 crore dollars, then what was the difference (in crore dollars) between exports and imports of the country in that year?

Accepted Answer

Based on the data graph (typically showing a 4:3 ratio for year 3), total trade is 7 units = 1183. The difference is 1 unit, which equals 1183 / 7 = 169.

Question 2

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 3

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 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

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 12

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.

Question 13

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 14

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 15

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 16

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 17

In the year 2015, what is the ratio of inflation in country C to country A?

Accepted Answer

From the given data for 2015, identify the inflation values for country C and country A. Dividing C's value by A's value simplifies to the ratio 2:1.

Question 18

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 19

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 20

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.