Staff Selection Commission Sub Inspector Exam
Question : If decreasing 110 by $x\%$ gives the same result as increasing 50 by $x\%$, then $x\%$ of 650 is what percentage (correct to the nearest integer) is more than $(x-10)\%$ of 780?
Option 1: 12%
Option 2: 17%
Option 3: 14%
Option 4: 18%
Correct Answer: 14%
Solution : On decreasing 110 by $x\%$ as $110(1 - \frac{x}{100})$ and the increase of 50 by $x\%$ as $50(1 + \frac{x}{100})$. According to the question, $⇒110(1 - \frac{x}{100}) = 50(1 + \frac{x}{100})$ $⇒1100-11x=500+5x$ $⇒16x=600$ $⇒x=\frac{75}{2}$ $⇒x=37.5$% Next, we calculate $x\%$ of 650. So, 650 × $\frac{37.5}{100}$ = 243.75 Then,$(x-10)\%$ of 780. So, 780 × $\frac{27.5}{100}$ = 214.5 The required percentage = $\frac{243.75-214.5}{214.5}$ × 100 = 13.63% ≈ 14% Hence, the correct answer is 14%
Question : Select the most appropriate meaning of the underlined idiom. We dodged a bullet when we didn’t fall for the agents’ words.
Option 1: To give something a try
Option 2: To narrowly avoid situation
Option 3: To be out of your comfort zone
Option 4: To start performing better
Correct Answer: To narrowly avoid situation
Solution : The second option is the correct choice.
The expression dodged a bullet is an idiomatic way of saying that someone or something narrowly avoided a potential disaster or harm. In the provided sentence, it suggests that by not falling for the agents' words, the speaker or the situation narrowly escaped a negative outcome or consequence. It implies relief and a recognition of having avoided a potentially harmful or problematic situation.
Therefore, the correct answer is: To narrowly avoid situation
Question : Which of the following human genetic disorders is sex-linked?
Option 1: Haemophilia
Option 2: Cystic fibrosis
Option 3: Albinism
Option 4: Phenylketonuria
Correct Answer: Haemophilia
Solution : The correct option is Haemophilia.
Haemophilia is a sex-linked genetic condition in humans. A mutation in the genes responsible for blood clotting factors causes it, resulting in prolonged, and profuse bleeding, even from mild injuries. Because haemophilia is inherited on the X chromosome, it is more frequent in men. Females are frequently carriers of the gene, which they can pass on to their sons.
Question : The concept of tissue culture was introduced by
Option 1: Hofmeister
Option 2: Hanstein
Option 3: Gottlieb Haberlandt
Option 4: Richard Hamming
Correct Answer: Gottlieb Haberlandt
Solution : The correct option is Gottlieb Haberlandt.
Gottlieb Haberlandt, a German botanist, introduced the idea of tissue culture in 1902. He was the first to propose that plant cells may be cultured outside of the plant body in a nutritional media. In 1902, he released a paper titled "Culture of Plant Cells" in which he discussed his research on cultivating plant cells in the nutrient solution.
Question : Comprehension: Read the given passage and answer the questions that follow. Climate policy must now put health at the centre and promote climate change mitigation policies that bring health benefits simultaneously. Health-focused climate policy would help bring about a planet that has cleaner air, more abundant and safer fresh water and food, more effective and fairer health and social protection systems, and, as a result, healthier people. Investments in clean energy will yield health gains that repay those investments twice over. There are proven interventions able to reduce emissions of short-lived climate pollutants, for instance, applying higher standards for vehicle emissions, which have been calculated to save approximately 2.4 million lives per year, through improved air quality and reduce global warming by about 0.5°C by 2050. The cost of renewable sources of energy has decreased significantly in the last few years, and solar energy is now cheaper than coal or gas in most major economies. Question: Which of the following most accurately states the central idea of the passage?
Option 1: Greenhouse gases
Option 2: Pollution
Option 3: Climate policy for health
Option 4: Fossil fuels
Correct Answer: Climate policy for health
Solution : The answer is the third option.
Explanation: The central idea of the passage is that climate policy should prioritise health, and by doing so, it can bring about multiple benefits such as cleaner air, safer water and food, more effective health and social protection systems, and overall healthier populations.
Therefore, the correct answer is climate policy for health.
Question : Which measure of memory is the largest?
Option 1: Megabyte(MB)
Option 2: Gigabyte(GB)
Option 3: Terabyte(TB)
Option 4: Kilobyte(KB)
Correct Answer: Terabyte(TB)
Solution : The correct option is Terabyte (TB).
The terabyte (TB) is the largest unit of memory among those stated. From smallest to greatest, these memory sizes are: A kilobyte (KB) is 1,000 bytes.
As a result, a Terabyte (TB) is greater than a Gigabyte (GB), which is greater than a Megabyte (MB), and so on.
Question : Directions: A man was 32 years of age when he had his first son. His wife was 35 years of age when his son attained the age of 7 years. The difference in age between the man and his wife is?
Option 1: 7 years
Option 2: 3 years
Option 3: 5 years
Option 4: 4 years
Correct Answer: 4 years
Solution : Given: The age of the wife was 35 years and the age of the son was 7 years.
According to the question – The age of the wife when her son was born was (35 – 7) = 28 years But, the age of the man was 32 years old when his son was born. Therefore, the difference in age between the man and his wife is (32 – 28) = 4 years.
So, the difference in age between the man and his wife is 4 years. Hence, the fourth option is correct.
Question : Directions: In the question, a sentence is given with a blank to be filled in with an appropriate word. Four alternatives are suggested for each question. Choose the correct alternative out of the four alternatives. I am exhausted; let's _____ a day.
Option 1: call it
Option 2: call at
Option 3: call off
Option 4: call in
Correct Answer: call it
Solution : The correct answer is the first option.
Call it: It is often used to suggest making a decision or judgement.
The meanings of the other phrasal verbs are as follows:
Call off: It means to cancel or abort a planned event or action.
Call at: It means to visit or stop briefly at a place.
Call in: It means to ask for or request someone's help or expertise.
The complete sentence should be: "I am exhausted; let's call it a day".
Question : Which of the following is not a food preservative?
Option 1: Aqua regia
Option 2: Vinegar
Option 3: Sodium chloride
Option 4: Sodium nitrite
Correct Answer: Aqua regia
Solution : The correct answer is Aqua regia.
Aqua regia is not a food preservative. It is a highly corrosive mixture of nitric acid and hydrochloric acid. It is typically used for dissolving noble metals, not for preserving or extending the shelf life of food.
Question : The Tripartite Struggle, also known as the Kannauj Triangle Wars, took place in the 8th and 9th centuries, between which of these three great Indian dynasties?
Option 1: The Paramars, The Chauhans The Gahadavalas
Option 2: The Palas, The Pratiharas and The Rashtrakutas
Option 3: The Pandyas,The Pratiharas and The Rashtrakutas
Option 4: The Cholas, The Pratiharas and The Rashtrakutas
Correct Answer: The Palas, The Pratiharas and The Rashtrakutas
Solution : The correct option is The Palas, The Pratiharas and The Rashtrakutas.
The Tripartite Struggle, also known as the Kannauj Triangle Wars, took place in the 8th and 9th centuries AD in India. The three main Indian dynasties involved in this conflict were the Palas, the Pratiharas, and the Rashtrakutas. These dynasties fought for control over the region of Kannauj, a strategically important city in North India.
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