Staff Selection Commission Combined Graduate Level Exam
Question : The simplified value of $\small \left (1-\frac{2xy}{x^{2}+y^{2}}\right )\div\left (\frac{x^{3}-y^{3}}{x-y}-3xy\right)$ is:
Option 1: $\frac{1}{x^{2}-y^{3}}$
Option 2: $\frac{1}{x^{2}+y^{2}}$
Option 3: $\frac{1}{x-y}$
Option 4: $\frac{1}{x+y}$
Correct Answer: $\frac{1}{x^{2}+y^{2}}$
Solution : Given: $(1–\frac{2xy}{x^{2}+y^{2}})\div( \frac{x^{3}–y^{3}}{x–y}–3xy)$ = $\frac{(x^{2}+y^{2}–2xy}{x^{2}+y^{2}})\div( \frac{(x–y)(x^{2}+xy+y^{2})}{x–y}–3xy)$ = $\frac{(x–y)^{2}}{x^{2}+y^{2}}\div(x^{2}+xy+y^{2}–3xy)$ = $\frac{(x–y)^{2}}{x^{2}+y^{2}}\div(x^{2}+y^{2}–2xy)$ = $\frac{(x–y)^{2}}{x^{2}+y^{2}}\div(x–y)^{2}$ = $\frac{1}{x^{2}+y^{2}}$ Hence, the correct answer is $\frac{1}{x^{2}+y^{2}}$.
Question : Directions: In an institution where there are 800 students, students use different modes of transport to go to the institution and return. The given pie diagram represents the required data. Study the diagram carefully and answer the question.
The number of students who travelled by Public bus is:
Option 1: 150
Option 2: 120
Option 3: 130
Option 4: 125
Correct Answer: 120
Solution : Given: Total students = 800 The total value of the pie chart = 360° The number of students who travelled by public bus $=\frac{54}{360}×800=120$ Hence, the correct answer is 120.
Question : Select the INCORRECTLY spelt word in the given sentence. To achieve somthing gigantic, you have to grind for a considerable amount of time.
Option 1: somthing
Option 2: considerable
Option 3: gigantic
Option 4: achieve
Correct Answer: somthing
Solution : The correct choice is the first option.
Explanation: "Somthing" is a misspelling; the correct spelling is something.
"Something" refers to a thing that is unknown, unspecified, or not explicitly named. It's a term used when referring to a particular object, concept, or entity without
Question : In which of the following places is the Tak Tok festival celebrated?
Option 1: Assam
Option 2: Nagaland
Option 3: Ladakh
Option 4: Tripura
Correct Answer: Ladakh
Solution : The correct option is Ladakh.
The Tak Tok festival is the festival of the Buddhist community. This festival is celebrated by the monks and villagers. Some other festivals in Ladakh are the Losar, Dosmoche, Matho Nagrang, Hemis, Sindhu Darshan, and Ladakh Festival.
Question : Directions: By interchanging the given two signs and numbers which of the following equations will be not correct? + and ×, 5 and 4 I. 4 + 8 × 5 – 7 ÷ 1 = 37 II. 5 × 3 – 4 + 6 ÷ 2 = – 8
Option 1: Only II
Option 2: Neither I nor II
Option 3: Only I
Option 4: Both I and II
Correct Answer: Neither I nor II
Solution : Given: + and ×, 5 and 4 I. 4 + 8 × 5 – 7 ÷ 1 = 37 II. 5 × 3 – 4 + 6 ÷ 2 = – 8
Interchange the numbers and signs in the equations one by
Question : In the figure, $\mathrm{XYZ}$ is a secant and $\mathrm{ZT}$ is a tangent to the circle at $\mathrm{T}$. If $\mathrm{TZ}=12$ $\mathrm{cm}$ and $Y Z=8 \mathrm{~cm}$, then find the length of $XY$.
Option 1: 8 cm
Option 2: 9 cm
Option 3: 6 cm
Option 4: 10 cm
Correct Answer: 10 cm
Solution : According to the question, $ZX \times ZY = ZT^2$ ⇒ $8 \times (YZ + XY) = 12^2$ ⇒ $8 \times (8 + x) = 144$ ⇒ $8 + x = 18$ ⇒ $x = 10$ cm Hence, the correct answer is 10 cm.
Question : Directions: A + B means A is the father of B; A * B means A is the sister of B; A % B means A is the daughter of B; A \$ B means A is the son of B. If L % M + N * O \$ P, then how is L related to P?
Option 1: Sister
Option 2: Daughter
Option 3: Mother
Option 4: Mother-in-law
Correct Answer: Daughter
Solution : Given: A + B ⇒ A is the father of B A * B ⇒ A is the sister of B A % B ⇒ A is the daughter of B A \$ B ⇒ A is the son of B
As per the given
Question : Two persons A and B working separately can sanitise a building in 6 hours and 10 hours, respectively. They work in stretches of one hour alternately. If A begins at 8 a.m., then when will the work be finished?
Option 1: $9\frac{1}{3}$ h
Option 2: $7\frac{1}{3}$ h
Option 3: $6\frac{1}{3}$ h
Option 4: $8\frac{1}{3}$ h
Correct Answer: $7\frac{1}{3}$ h
Solution : Person A can sanitise a building in 6 hrs. Person B can sanitise a building in 10 hrs. Total work = Efficiency$\times$Times Let the total work = LCM of 6 and 10 = 30 units Efficiency of A = $\frac{30}{6}$ = 5 units Efficiency
Question : Which one of the following bio reserves of India is not included in the World Network of Biosphere Reserve?
Option 1: Sundarbans
Option 2: Gulf of Mannar
Option 3: Nanda Devi
Option 4: Corbett
Correct Answer: Corbett
Solution : The correct answer is Corbett.
The Biosphere Reserve program was initiated by UNESCO in 1971; it was known as the Man and Biosphere Reserve program. It is a designation given to large land-based or aquatic ecosystems having natural and cultural significance. Presently, India has
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. The Sun is the star at the centre of (1) __________ Solar System. It is a nearly perfect ball of hot plasma. The Sun has inspired us since ancient times. It’s central to mythology and religion in (2) ____________ around the world. It keeps our planet warm enough for living things to grow. It gives us light, so we can see. It is by far the most important (3) _________of energy for life on Earth. It is about a hundred times as wide (4)________ the Earth. If there were no sun, many things wouldn’t occur, like photosynthesis or the presence of oxygen, which would have caused no existence of life. Select the most appropriate option to fill in the blank number 1.
Option 1: huge
Option 2: typical
Option 3: a
Option 4: the
Correct Answer: the
Solution : The correct choice is the fourth option.
In this context, the definite article the is used before "Solar System" because it refers to a specific and well-known solar system—the one that includes Earth.
The meanings of other options are as follows:
Huge means extremely
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