SSC CGL Undated PYQs

Question 1

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question? 54 x 9 - 3 ÷ 4 = ? 54 x 9 - 3 ÷ 4 = ?

Accepted Answer

Replace the symbols according to the given rules: 54 ÷ 9 + 3 - 4. Using BODMAS, first divide (54 ÷ 9 = 6), then add (6 + 3 = 9), and subtract (9 - 4 = 5).

Question 2

A, B and C can finish a job working alone in 72, 24 and 36 days respectively. In how many days they can finish the job if they worked together?

Accepted Answer

Total work = LCM(72, 24, 36) = 72 units. Efficiencies: A=1, B=3, C=2. Total efficiency = 1+3+2 = 6 units/day. Time taken together = 72 / 6 = 12 days.

Question 3

If the tickets for Screen 1, Screen 2 and Screen 3 are Rs 350, Rs 300 and Rs 250 respectively, then which screen has the maximum total revenue for three shows?

Accepted Answer

Revenue is calculated by multiplying the ticket price by the number of tickets sold. Based on the provided data, Screen 3 generates the highest total revenue across the three shows.

Question 4

A sum fetched a total simple interest of Rs 1200 at the rate of 7.5%/yr in 4 years. What is the sum (in Rs)?

Accepted Answer

Using the Simple Interest formula: SI = (P × R × T) / 100. Here, 1200 = (P × 7.5 × 4) / 100. 1200 = P × 30 / 100, which gives P = 4000.

Question 5

A boat goes a certain distance at 40 km/hr and comes back the same distance at 24 km/hr. What is the average speed (in km/hr) for the total journey?

Accepted Answer

For equal distances, the average speed is calculated using 2xy/(x+y). Here, it is (2 × 40 × 24) / (40 + 24) = 1920 / 64 = 30 km/hr.

Question 6

The process of depositing a layer of zinc on iron is called ___________ .

Accepted Answer

Galvanisation is a protective process where a layer of zinc is applied to iron or steel to prevent it from rusting. The zinc acts as a sacrificial barrier.

Question 7

At what time the percentage change in number of parked cars is the maximum?

Accepted Answer

Calculate the percentage change for each given time interval using the formula: ((New - Old) / Old) × 100. The interval from 8 am to 9 am yields the highest percentage value.

Question 8

If 29$14 = 6, 37$25 = 3 then what is the value of 84$62 = ?

Accepted Answer

The pattern is the sum of the digits of the first number minus the sum of the digits of the second number. For 84$62: (8+4) - (6+2) = 12 - 8 = 4.

Question 9

If 9x3=3; 15x3=5; 60x5=12; then what is the value of 27x3 = ?

Accepted Answer

The 'x' symbol represents division in this pattern. 9/3=3, 15/3=5, and 60/5=12. Therefore, 27 divided by 3 equals 9.

Question 10

If 3x + [1/(5x)] = 7, then what is the value of 5x/(15x2 + 15x + 1)?

Accepted Answer

Given 3x + 1/(5x) = 7, multiplying by 5x gives 15x² + 1 = 35x. Substitute this into the denominator: 5x / (35x + 15x) = 5x / 50x = 1/10.

Question 11

Excluding stoppages, the speed of a bus is 72 kmph and including stoppages, it is 60 kmph. For how many minutes does the bus stop per hour?

Accepted Answer

Stoppage time per hour is calculated as (Difference in speed / Speed without stoppage) × 60. Here, it is ((72 - 60) / 72) × 60 = (12 / 72) × 60 = 10 minutes.

Question 12

There are how many vocal cords in the human voice box?

Accepted Answer

The human voice box, or larynx, contains exactly two vocal cords. They are twin infoldings of mucous membrane that vibrate to produce sound.

Question 13

How many players are there in a team of Volleyball?

Accepted Answer

A standard volleyball team consists of 6 players on the court at any one time. They are arranged in front and back rows to play the game.

Question 14

Magnesium oxide (MgO) + Water (H2O) = ?

Accepted Answer

Magnesium oxide reacts with water to form magnesium hydroxide. Since the valency of Mg is +2 and OH is -1, the correct chemical formula is Mg(OH)2.

Question 15

Which of the following won The Man Booker Prize 2016?

Accepted Answer

Paul Beatty won the 2016 Man Booker Prize for his satirical novel 'The Sellout', making him the first American author to win this prestigious award.

Question 16

For what value of k, the expression x6 – 18x3 + k will be a perfect square?

Accepted Answer

Let y = x^3. The expression becomes y^2 - 18y + k. For a perfect square, it must match (y - 9)^2 = y^2 - 18y + 81. Thus, k = 81.

Question 17

Which railway station is used for immigration and customs of passengers who travel on the Thar Express between Pakistan and India?

Accepted Answer

Zero Point railway station, located on the India-Pakistan border in Sindh, is the designated stop for immigration and customs checks for passengers traveling on the Thar Express.

Question 18

The cost price of 60 articles is same as the selling price of x articles. If there is a profit of 20%, then what is the value of x?

Accepted Answer

Given CP of 60 = SP of x, the ratio SP/CP = 60/x. A 20% profit means SP/CP = 120/100 = 6/5. Equating them: 60/x = 6/5, which gives x = 50.

Question 19

Select the related word from the given alternatives. Lion : Lioness :: Bull : ?

Accepted Answer

The relationship is male to female of the same species. Just as a lioness is the female counterpart of a lion, a cow is the female counterpart of a bull.

Question 20

A truck travels 36 km North, then it turns West and travels 9 km, then it turns South and travels 50 km, then it turns to its left and travels 9 km. Where is it now with reference to its starting position?

Accepted Answer

The truck goes 36 km North, 9 km West, 50 km South, and 9 km East (left turn from South). Net vertical distance is 50 - 36 = 14 km South.