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Staff Selection Commission Combined Graduate Level Exam

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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: $\frac{1}{x+y}$

Team Careers360 25th Jan, 2024

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 $\frac{1}{x^{2}+y^{2}}$.

18 Views

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

Team Careers360 25th Jan, 2024

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

24 Views

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

Team Careers360 25th Jan, 2024

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.

16 Views

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

Team Careers360 25th Jan, 2024

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.

43 Views

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

Team Careers360 25th Jan, 2024

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

16 Views

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

Team Careers360 25th Jan, 2024

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

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