Staff Selection Commission Combined Graduate Level Exam
Question : If $\alpha$ and $\beta$ are the roots of equation $x^{2}-2x+4=0$, then what is the equation whose roots are $\frac{\alpha ^{3}}{\beta ^{2}}$ and $\frac{\beta ^{3}}{\alpha ^{2}}?$
Option 1: $x^{2}-4x+8=0$
Option 2: $x^{2}-32x+4=0$
Option 3: $x^{2}-2x+4=0$
Option 4: $x^{2}-16x+4=0$
Correct Answer: $x^{2}-2x+4=0$
Solution : Given: $\alpha$ and $\beta$ are roots of the equation $x^{2}-2x+4=0$ ⇒ $\alpha+\beta=2$ and $\alpha\beta=4$ Now we need to find the equation whose roots are $\frac{\alpha ^{3}}{\beta ^{2}}$ and $\frac{\beta ^{3}}{\alpha ^{2}}$. $\frac{\alpha^{3}}{\beta^{2}}+\frac{\beta^{3}}{\alpha^{2}}$ = $\frac{\alpha ^{5}+\beta^{5}}{\alpha^{2}\beta ^{2}}$ = $\frac{(\alpha ^{2}+\beta^{2}) \times(\alpha ^{3}+\beta^{3})-(\alpha ^{2}\beta ^{3}+\alpha ^{3}\beta ^{2})}{(\alpha\beta)^{2}}$
Question : If the HCF of two numbers is 8, then which of the following can never be their LCM?
Option 1: 56
Option 2: 48
Option 3: 42
Option 4: 40
Correct Answer: 42
Solution : Since the HCF of two numbers is 8, LCM of the two numbers will only be a multiple of 8. So, the LCM can be 56, 48, and 40 but never be 42. Hence, the correct answer is 42.
Question : Directions: In the following question, a sentence is given with a blank that is to be filled in with an appropriate word. Four alternatives are suggested; choose the correct alternative out of them as your answer.
The Chief Minister asked her officers to _______ the process of procuring food for the poor from the market.
Option 1: speed up
Option 2: expedite
Option 3: hasten
Option 4: do fast
Correct Answer: speed up
Solution : The correct answer is in option one.
The correct sentence is: "The Chief Minister asked her officers to speed up the process of procuring food for the poor from the market."
Speed up means to move or happen more quickly. In this context, it
Question : Comprehension: In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
When he was in college, a famous poet made a useful distinction for him. He had drunk (1)________ in the poet's company to be compelled to describe to him a poem he was (2)_____of. It would be a monologue of sorts, the self-contemplation of a student on a summer afternoon who is reading Euphues. The poem itself would be a subtle (3)_____ of euphuisms, translating the heat, the day, and the student's concerns, into symmetrical posies; translating even his (4) ______and boredom with that famously foolish book into a euphuism. The poet nodded his big head in a sympathetic, rhythmic way as this was (5)_____ to him, then told him that there are two kinds of poems. There is the kind you write; there is the kind you talk about in bars. Both kinds have value and both are poems, but it's fatal to confuse them.
Select the most appropriate option to fill in blank no. 1.
Option 1: enough
Option 2: many
Option 3: far
Option 4: since
Correct Answer: enough
Solution : The first option is the correct choice.
Enough means to the required degree or extent, and in this context, it means that in the poet's company, he had consumed the alcohol to the required degree or to the extent of losing control of his behaviour.
Question : Parts of the following sentence have been given as options. Select the option that contains a grammatical error.
He was / paid handsomely for / his ability to handle / the crowd skillful.
Option 1: paid handsomely for
Option 2: his ability to handle
Option 3: the crowd skillful.
Option 4: He was
Correct Answer: the crowd skillful.
Solution : The third option is the correct choice.
Explanation: The error lies in the use of the adjective skillful to modify the noun crowd. The correct form should be the adverb skillfully to modify the verb handle. Adverbs are used to modify
Question : In C language, the formatting character should be preceded by the symbol:
Option 1: +
Option 2: /
Option 3: %
Option 4: -
Correct Answer: %
Solution : The correct option is %.
Formatting characters in C language must be preceded by the '%' sign. This symbol indicates that the next character(s) in the format string are placeholders for values that will be inserted into the formatted output using functions such as '
Question : Rs. 2,420 were divided among A, B, and C so that A : B = 5 : 4 and B : C = 9 : 10. Then C gets:
Option 1: Rs. 680
Option 2: Rs. 800
Option 3: Rs. 900
Option 4: Rs. 950
Correct Answer: Rs. 800
Solution : Given: Total sum = Rs. 2420 A : B = 5 : 4 = 45 : 36 B : C = 9 : 10 = 36 : 40 So, A : B : C = 45 : 36 : 40 Now, A + B
Question : What does the term 'Ebola' stand for?
Option 1: A viral disease outbreak in West Africa.
Option 2: A viral disease outbreak in Bangladesh.
Option 3: A city in Syria was destroyed by ISIS.
Option 4: None of these
Correct Answer: A viral disease outbreak in West Africa.
Solution : The correct option is A viral disease outbreak in West Africa.
The West African Ebola virus disease (EVD) epidemic, mainly in Guinea, Liberia and Sierra Leone, was a terrible event that happened between 2014 and 2016. The Ebola
Question : Directions: In the following question, out of the four alternatives, select the alternative that will improve the bracketed part of the sentence. In case no improvement is needed, select "No Improvement".
Do you have (some sugar)?
(1) any sugar
(2) little sugar
(3) small sugar
(4) No Improvement
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (4)
Solution : The correct choice is the fourth option.
"Some" is the correct determiner that correctly fits in the sentence, as "some" is used for indefinite quantity and sugar is an uncountable noun. Although the quantity is not defined, it implies a limited quantity.
Therefore, the correct
Question : Two items A and B are sold at a profit of 10% and 15%, respectively. If the amount of profit received is the same, then the cost price of A and B may be:
Option 1: Rs. 1,000 and Rs. 1,500
Option 2: Rs. 5,000 and Rs. 2,000
Option 3: Rs. 3,000 and Rs. 2,000
Option 4: Rs. 3,000 and Rs. 5,000
Correct Answer: Rs. 3,000 and Rs. 2,000
Solution : Let the cost price of item A as P and the cost price of item B as Q. Given that items A and B are sold at a profit of 10% and 15%, respectively, and the amount of profit received is
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