Staff Selection Commission Combined Higher Secondary Level Exam
Question : If $2(x^{2}+\frac{1}{x^{2}})-(x-\frac{1}{x})-7=0$, then two values of $x$ are:
Option 1: $1, 2$
Option 2: $2,-\frac{1}{2}$
Option 3: $0, 1$
Option 4: $\frac{1}{2},1$
Correct Answer: $2,-\frac{1}{2}$
Solution : Given: $2(x^{2}+\frac{1}{x^{2}})-(x-\frac{1}{x})-7=0$ We know that, $x^{2}+\frac{1}{x^{2}} = (x-\frac{1}{x})^2+2$ ⇒ $2[(x-\frac{1}{x})^2+2]-(x-\frac{1}{x})-7=0$ Put $x-\frac{1}{x}=t$ ⇒ $2t^2+4-t-7=0$ ⇒ $2t^2-t-3=0$ ⇒ $2t^2-3t+2t-3=0$ ⇒ $t(2t-3)+1(2t-3)=0$ ⇒ $(2t-3)(t+1)=0$ $\therefore t=\frac{3}{2}$ or, $ -1$ Now if, $x-\frac{1}{x}=\frac{3}{2}$ ⇒ $2x^2-2=3x$ ⇒ $2x^2-3x-2=0$ ⇒ $2x^2-4x+x-2=0$ ⇒ $2x(x-2)+1(x-2)=0$ ⇒ $(x-2)(2x+1)=0$ $\therefore x = 2$ or,
Question : Directions: In the question, a part of the sentence is in bold. Below are given alternatives to the bold part at (1), (2), and (3) that may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (4).
I could not help to laugh at the joke.
(1) Laughing
(2) Laugh
(3) To laughing
(4) No Improvement
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (1)
Solution : The sentence can be improved using the first option.
The verb help is typically followed by a gerund (-ing form of a verb) when it is used to express that someone can't avoid or refrain from doing something. In this context, the action is laughing,
Question : The diameter of the wheel of a cycle is 7 cm. A cyclist takes 75 minutes to reach a destination at the speed of 36.3 km/hr. How many revolutions will the wheel make during the journey?
Option 1: 206250
Option 2: 212520
Option 3: 196280
Option 4: 216580
Correct Answer: 206250
Solution : The diameter of the wheel of a cycle = 7 cm Time taken to reach the destination = 75 minutes = 1.25 hr Seed of cycle = 36.3 km/hr Total distance = Time × Speed = 1.25 × 36.3 km Number of revolutions = $\frac{\text{Total
Question : Directions: In the following question, select the one which is different from the other three alternatives.
Option 1: 24
Option 2: 28
Option 3: 42
Option 4: 56
Correct Answer: 42
Solution : Let's check the options – First option: 24; 24 ÷ 4 = 6; 24 is divisible by 4. Second option: 28; 28 ÷ 4 = 7; 28 is divisible by 4. Third option: 42; 42 ÷ 4 = 10.5; 42 is not divisible by 4.
Question : What is the value of $(a+b)^2+(a-b)^2$?
Option 1: $8ab$
Option 2: $4ab$
Option 3: $4(a^2+b^2)$
Option 4: $2(a^2+b^2)$
Correct Answer: $2(a^2+b^2)$
Solution : Given, $(a+b)^2+(a-b)^2$ = $a^2+b^2+2ab+a^2+b^2-2ab$ = $2(a^2+b^2)$ Hence, the correct answer is $2(a^2+b^2)$.
Question : Which among the following companies made an Initial Public Offering (IPO) in the Indian stock market in 2022?
Option 1: HDFC Bank
Option 2: JSW Steel
Option 3: Avenue Supermarts
Option 4: Adani Wilmar
Correct Answer: Adani Wilmar
Solution : The correct answer is Adani Wilmar.
Adani Wilmar Limited is an Indian multinational food and beverage conglomerate based in Ahmedabad, Gujarat. The company was founded in 1999 as a joint venture between Adani Enterprises and Wilmar International.
Adani Wilmar launched their IPO in
Question : Directions: In the given 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.
While mother mixed the cake ___, Dipu stood at the table watching her.
Option 1: batter
Option 2: concoction
Option 3: recipe
Option 4: mixture
Correct Answer: batter
Solution : The first option is the correct choice.
Batter refers to the mixture of ingredients used for making the cake.
The meanings of the other options are as follows:
Question : Directions: Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. G_ IJG_HIJGGH_ IJGGHH _IJ
Option 1: HIJG
Option 2: HGHI
Option 3: JGGJ
Option 4: GHHI
Correct Answer: HGHI
Solution : Given: G_ IJG_HIJGGH_ IJGGHH _IJ
To fill the series we have to divide the series – G_ IJ/G_HIJ/GGH _ IJ/GGHH _IJ Let's check each option – First option: HIJG; GHIJ/GIHIJ/GGHJIJ/GGHHGIJ (No repeated pattern has been found.) Second
Question : Choose the word that is opposite in meaning to the given word. Credible.
Option 1: Unlikely
Option 2: Unswerving
Option 3: Conclusive
Option 4: Sheltered
Correct Answer: Unlikely
Solution : The correct choice is the first option.
The word credible refers to being capable of being believed or trusted, indicating reliability and trustworthiness. The opposite of credible would be something that is not likely to be believed or trusted.
The meanings of the other options
Question : Which of the following states is not a major producer of fertilisers?
Option 1: Himachal Pradesh
Option 2: Gujarat
Option 3: Maharashtra
Option 4: Uttar Pradesh
Correct Answer: Himachal Pradesh
Solution : The correct option is Himachal Pradesh.
Himachal Pradesh is not considered a major producer of fertilisers in India. Some of the major producers of fertilisers in India include states like Gujarat, Uttar Pradesh and Maharashtra. These states have significant manufacturing facilities and contribute
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