Staff Selection Commission Multi Tasking Staff Exam
Question : A sum of INR 900 is divided into two parts such that the interest on the first part at 4% simple interest per annum and that on the other part at 2% simple interest per annum are equal. What is the interest accumulated on each part in a year?
Option 1: INR 18
Option 2: INR 6
Option 3: INR 12
Option 4: INR 20
Correct Answer: INR 12
Solution : Total sum, $P$ = INR 900 The interest rate on the first part, $R_1$ = 4% The interest rate on the second part, $R_2$ = 2% Time, $n$ = 1 year Let $x$ and $900-x$ be the two parts. Simple interest, SI = $\frac{PnR}{100}$
Question : What is the value of $\frac{56}{7} \times\left(\frac{24}{81} \times \frac{729}{72}\right)+\frac{42}{6}$?
Option 1: 30
Option 2: 32
Option 3: 31
Option 4: 33
Correct Answer: 31
Solution : $\frac{56}{7} \times\left(\frac{24}{81} \times \frac{729}{72}\right)+\frac{42}{6}$ $=8×(3)+7$ $=24+7$ $=31$ Hence, the correct answer is 31.
Question : What will the curved surface area of a cylinder with a radius of 10 cm and height of 20 cm? (use $\pi=3.14$)
Option 1: 1345 cm2
Option 2: 1453 cm2
Option 3: 1256 cm2
Option 4: 1234 cm2
Correct Answer: 1256 cm2
Solution : Given: A cylinder with a radius of 10 cm and height of 20 cm. The curved surface area of a cylinder with a radius $r$ and height $h$ $=2\pi rh$ $=2\times 3.14\times 10\times 20=1256$ cm2 Hence, the correct answer is 1256 cm
Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 503, 509, 521, 539, ?
Option 1: 576
Option 2: 545
Option 3: 563
Option 4: 535
Correct Answer: 563
Solution : Given: 503, 509, 521, 539, ?
Add the multiples of 6 to the previous number to obtain the next number of the series – 503 + 6 = 509, 509 + 12 = 521, 521 + 18 = 539, 539 + 24 = 563
So,
Question : Directions: Select the option figure in which the given figure is embedded (rotation is not allowed).
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : Since the rotation is restricted. So, the embedded figure will have the same orientation as the main figure. By comparison of the question figure with all the option figures, it is evident that the given question figure is embedded only in the third option figure.
Hence,
Question : The statement below has been given with bracketed text. Select the option with correct idiom for the bracketed text.
That new budget bill was (totally useless) before it hit the Senate.
Option 1: a cry wolf
Option 2: a dead duck
Option 3: cold feet
Option 4: a fuel to the fire
Correct Answer: a dead duck
Solution : The correct choice is the second option.
The idiom a dead duck is used to describe something that is certain to fail or is already a failure. In the context of the sentence, it implies that the budget bill was ineffective and had
Question : The following table shows the number of bottles of 6 different colours sold by a shop in a month.
The total number of bottles of C4 and C5 sold in that month is approximate what percentage of the total number of bottles of all the 6 colours taken together sold in that month?
Option 1: 21.33%
Option 2: 24.13%
Option 3: 29.17%
Option 4: 32.66%
Correct Answer: 29.17%
Solution : Total Bottles C4 and C5: = 42 + 28 = 70 Total Bottles for all 6 colours: = 46 + 34 + 50 + 42 + 28 + 40 = 240 Now, Percentage = $\frac{70}{240}$ × 100 = 0.291 × 100 = 29.17 Hence, the
Question : Directions: If a train 150 m long crosses a pole in 12 seconds, then what is the speed of the train in km/h?
Option 1: 45
Option 2: 60
Option 3: 50
Option 4: 75
Correct Answer: 45
Solution : Given: Length of a train = 150m Time taken to cross the pole = 12sec
So, Speed = Distance ÷ Time = 150 ÷ 12 = $\frac{25}{2}$ m/sec Convert it to km/h→$\frac{25}{2} × \frac{18}{5}$ = 45 km/h
So, 45 km/h is the required answer. Hence,
Question : Select the most appropriate antonym of the given word. Viscous
Option 1: Grim
Option 2: Brutal
Option 3: Watery
Option 4: Thick
Correct Answer: Watery
Solution : The third option is the correct choice.
Viscous describes a substance having a thick and sticky consistency, displaying high resistance to flow, while watery denotes a thin and liquid consistency, characterised by ease of flow.
The meanings of the other options are as follows:
Grim
Question : The splitting of white light into its component colours is called ______.
Option 1: refraction
Option 2: reflection
Option 3: scattering
Option 4: dispersion
Correct Answer: dispersion
Solution : The correct answer is dispersion.
The splitting of white light into its component colours is called "dispersion". This phenomenon occurs because different colours of light have different wavelengths, and when light passes through a prism or a similar optical element, it gets separated into
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