Staff Selection Commission Multi Tasking Staff Exam
Question : The marked price of a computer is Rs. 10000. Selling price of the computer is Rs. 7650. If two successive discounts of 15 percent and x percent are given, then what is the value of x?
Option 1: 5 percent
Option 2: 15 percent
Option 3: 10 percent
Option 4: 20 percent
Correct Answer: 10 percent
Solution : The marked price of a computer is Rs. 10000. The selling price of the computer is Rs. 7650. According to the question, For two successive discounts selling price = $\frac{100-\text{Discount}_1\%}{100}× \frac{100-\text{Discount}_2\%}{100}×$ marked price $10000×\frac{85}{100}×\frac{100-x}{100}=7650$ $⇒100-x=90$ $\therefore x =10\%$ Hence, the correct answer is 10
Question : Directions: In a certain code language, GOP is coded as 38, and HVN is coded as 44. How will PNG be coded in that language?
Option 1: 42
Option 2: 37
Option 3: 29
Option 4: 32
Correct Answer: 37
Solution : Given: GOP is coded as 38, and HVN is coded as 44.
Add the positional value of GOP, to obtain the required code – G → 7; O → 15; P → 16 7 + 15 + 16 = 38 Thus, GOP is coded as
Question : The average of 10 numbers is 42. If each number is increased by 5, then what will be the new average?
Option 2: 47
Option 3: 92
Option 4: 57
Correct Answer: 47
Solution : Given: The average of 10 numbers is 42. If each number is increased by 5 then the average will also increase by 5. So, the new average = 42 + 5 = 47 Hence, the correct answer is 47.
Question : When did the Chauri Chaura incident take place?
Option 1: 1901
Option 2: 1915
Option 3: 1922
Option 4: 1908
Correct Answer: 1922
Solution : The correct answer is 1922.
A violent occurrence known as the Chauri Chaura incident took place on February 4, 1922, in the town of Chauri Chaura, which is located in the Gorakhpur district of the United Provinces (modern-day Uttar Pradesh) in British India. British
Question : A man covers half part of a certain distance at 35 km/hr. He covers 40 percent of the remaining distance at the speed of 8 km/hr and covers the rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?
Option 1: $\frac{920}{47}$ km/hr
Option 2: $\frac{680}{47}$ km/hr
Option 3: $\frac{840}{47}$ km/hr
Option 4: $\frac{760}{47}$ km/hr
Correct Answer: $\frac{840}{47}$ km/hr
Solution : Let the distance be D km. According to the question, Distance at 35 km/hr, he covers = $\frac{1}{2}$ × D At 8 km/hr, he covers 40% of $\frac{1}{2}$ × D = $\frac{1}{5}$D The rest of the distance = D – $\frac{1}{2}$D – $\frac{1}{5}$D =
Question : The alcohol and water in a mixture are in the ratio of 4 : 5 respectively. 20-litres water is added to it. If the ratio of alcohol and water in the new mixture is 1 : 3 respectively, then what is the total quantity of the alcohol in the new mixture?
Option 1: $\frac{80}{7}$ liters
Option 2: $15$ liters
Option 3: $\frac{60}{7}$ liters
Option 4: $\frac{90}{11}$ liters
Correct Answer: $\frac{80}{7}$ liters
Solution : Let the initial quantities of alcohol and water in the mixture as 4$x$ and 5$x$ respectively The total quantity of the mixture = 4$x$ + 5$x$ = 9$x$ After adding 20 litres of water, the new quantity of water = 5$x$ + 20 Now,
Question : All the changes in the weather are driven by the _________.
Option 1: moon
Option 2: Sun
Option 3: stars
Option 4: jovian planets
Correct Answer: Sun
Solution : The correct answer is the Sun.
The primary factor influencing our weather variations is the energy that the Earth receives from the Sun. Huge air masses, which are composed of both large and small weather systems in addition to the well-known day-night and summer-winter
Question : Pankaj sells an article and earns a profit of 55 percent. What will be the ratio of cost price and selling price?
Option 1: 20 : 37
Option 2: 17 : 25
Option 3: 18 : 25
Option 4: 20 : 31
Correct Answer: 20 : 31
Solution : We know, Profit percent = $\frac{\text{Selling price – Cost price}}{\text{Cost price}} × 100$ Given, Profit percent = 55% ⇒ $\frac{55}{100}=(\frac{\text{Selling price}}{\text{Cost price}}-1)$ ⇒ $\frac{55}{100}+1=\frac{\text{Selling price}}{\text{Cost price}}$ ⇒ $\frac{55+100}{100}=\frac{\text{Selling price}}{\text{Cost price}}$ ⇒ $\frac{155}{100}=\frac{\text{Selling price}}{\text{Cost price}}$ ⇒ Selling price : Cost price = 31 :
Question : A bottle holds 8 litres of a mixture of milk and water in a ratio of 3 : 1. 3 litres of water is added to the given mixture. Find the new ratio of milk and water in the mixture.
Option 1: 3 : 2
Option 2: 1 : 3
Option 3: 2 : 3
Option 4: 6 : 5
Correct Answer: 6 : 5
Solution : The mixture has a ratio of milk to water of 3 : 1, which means for every 3 parts of milk, there is 1 part of water ⇒ Total number of parts is 3 (milk) + 1 (water) = 4 ⇒ Value of
Question : A train 200 metres long, is running at a speed of 20 metres per second. In how much time (in seconds) it will cross a bridge of length 400 metres?
Option 1: 20
Option 2: 25
Option 3: 30
Option 4: 60
Correct Answer: 30
Solution : We have, Distance to cover = the length of the train + length of the bridge = 400 + 200 = 600 metres Speed = 20 metres per second $\text{Time}=\frac{\text{Distance}}{{\text{Speed}}}=\frac{600}{20}$ = 30 seconds Hence, the correct answer is 30 seconds.
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