Staff Selection Commission Combined Higher Secondary Level Exam
Question : Biodegradable wastes can usually be converted into useful substances with the help of:
Option 1: nuclear proteins
Option 2: radio- active substances
Option 3: viruses
Option 4: bacteria
Correct Answer: bacteria
Solution : The correct option is bacteria.
Biodegradable wastes are organic compounds that can be organically broken down by microbes such as bacteria and fungus into simpler, less harmful molecules. These microbes are essential in the breakdown process because they break down biodegradable materials into their fundamental
Question : Improve the underlined part of the sentence. Choose 'No improvement' as an answer if the sentence is grammatically correct. I can hear the band which is playing patriotic tunes, in the playground.
Option 1: patriotic tuning
Option 2: patriot tunes
Option 3: patriotically tuned
Option 4: No improvement
Correct Answer: No improvement
Solution : The fourth option is correct.
The phrase playing patriotic tunes is grammatically correct and makes sense within the context of the sentence.
"Patriotic tunes" is a common phrase used to describe music that is related to or supports love for one's country.
Therefore, the
Question : The rhythmic rise and fall of ocean water twice a day is called
Option 1: Tide
Option 2: Ocean current
Option 3: Wave
Option 4: Water cycle
Correct Answer: Tide
Solution : The correct answer is Tide.
The rhythmic rise and fall of ocean levels are known as Tide. It happens twice a day and is caused by the action of the gravitational force of the sun, moon and other celestial bodies on Earth's ocean. Tides
Question : Rearrange the parts of the sentence in correct order. P. despite pandemic-related travel complications, the Q. governments of India and France facilitated interactions R. NPCIL a binding techno-commercial offer on April 22, 2021 S. between EDF and NPCIL which allowed EDF to submit to
Option 1: RQSP
Option 2: QRSP
Option 3: RPSQ
Option 4: PQSR
Correct Answer: PQSR
Solution : The correct choice is the fourth option.
The correct order of the sentence is PQSR.
This order ensures a logical flow of information, as it begins by introducing the challenge of pandemic-related travel complications (P), followed by the governance of key countries like
Question : Select the most appropriate idiom for the underlined segment in the following sentence.
Brave people never hide at the moment of decision.
Option 1: When the crunch comes
Option 2: Beat the clock
Option 3: A hell of time
Option 4: Turn back the hands of time
Correct Answer: When the crunch comes
Solution : The correct choice is the first option.
When the crunch comes means when a crucial or critical moment arrives, especially one that requires a decision or action. It refers to a pivotal point or a decisive moment where a situation becomes difficult
Question : Directions: What should come in place of the question mark (?) in the given series? 57, 43, 31, 21, 13, (?)
Option 1: 5
Option 2: 6
Option 3: 9
Option 4: 7
Correct Answer: 7
Solution : Given: 57, 43, 31, 21, 13, (?)
Subtract consecutive even numbers starting from 14 in decreasing order to get the missing term – 57 – 14 = 43; 43 – 12 = 31; 31 – 10 = 21; 21 – 8 = 13; 13 –
Question : Directions: The diagram shows the age distribution of patients admitted to a hospital on a particular day. Study the diagram and answer the question.
The percentage of patients of age less than 45 years and less than to the hospital on that day is approximately equal to:
Option 1: 14%
Option 2: 20%
Option 3: 37%
Option 4: 62%
Correct Answer: 37%
Solution : From the graph, ⇒ The total number of patients aged less than 45 years = 1 + 4 + 8 = 13 ⇒ The total number of patients = 1 + 4 + 8 + 7 + 5 + 4 + 3 + 2 +
Question : Direction: The table shows the percentage of the total population of a city in different age groups. Study the table and answer the question.
If there are 22 million people below 36 years, then the number of people (in millions) in the age group (56 – 65) is:
Option 2: 5.5
Option 3: 3
Option 4: 3.5
Correct Answer: 5
Solution : The percentage of the total population in the age group 56-65 = 12.5% The percentages for the age groups up to 15, 16–25, and 26–35 = 20.00% + 18.25% + 16.75% = 55% The total population of the city = $\frac{22}{0.55}$ = 40 million $\therefore$
Question : I have x marbles, my elder brother has 3 more than me, while my younger brother has 3 less than me. If the total number of marbles is 15, the number of marbles that I have is:
Option 1: 3
Option 2: 5
Option 3: 8
Solution : Suppose, I have x marbles. My elder brother has (x + 3) marbles, My younger brother has (x – 3) marbles. According to the question, ⇒ x + (x + 3) + (x – 3) = 15 ⇒ 3x + 3 – 3 = 15
Question : If $0^{\circ}< A< 90^{\circ}$, then the value of $\tan ^{2}A+\cot^{2}A-\sec^{2}A \operatorname{cosec}^{2}A$ is:
Option 1: 0
Option 2: 1
Option 3: 2
Option 4: –2
Correct Answer: –2
Solution : Given: $0^{\circ}< A< 90^{\circ}$ $\tan ^{2}A+\cot^{2}A-\sec^{2}A \operatorname{cosec}^2A$ = $\frac{\sin^2 A}{\cos^2 A}+\frac{\cos^2 A}{\sin^2 A}-\frac{1}{\cos^2A\sin^2A}$ = $\frac{\sin^4+\cos^4-1}{\cos^2A\sin^2A}$ = $\frac{(\sin^2A+\cos^2A)^2-2\sin^2\cos^2A-1}{\cos^2A\sin^2A}$ = $\frac{1-2\sin^2A\cos^2A-1}{\cos^2A\sin^2A}$ = $\frac{-2\sin^2A\cos^2A}{\cos^2A\sin^2A}$ = $-2$ Hence, the correct answer is –2.
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