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Staff Selection Commission Combined Graduate Level Exam

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Question : If $x=a^{\frac{1}{2}}+a^{-\frac{1}{2}}$, $y=a^{\frac{1}{2}}- a^{-\frac{1}{2}}$, then the value of $(x^{4}-x^{2}y^{2}-1)+(y^{4}-x^{2}y^{2}+1)$ is:

Option 1: 16

Option 2: 13

Option 3: 12

Option 4: 14

Team Careers360 18th Jan, 2024

Correct Answer: 16


Solution : Given: $x=a^{\frac{1}{2}}+a^{\frac{-1}{2}}$ and $y=a^{\frac{1}{2}}-a^{\frac{-1}{2}}$
⇒ $x=\sqrt{a}+{\frac{1}{\sqrt{a}}}$ and $y=\sqrt{a}-{\frac{1}{\sqrt{a}}}$
⇒ $x+y=2\sqrt{a}$ and $x-y=\frac{2}{\sqrt{a}}$
So, $x^{4}-x^{2}y^{2}-1+y^{4}-x^{2}y^{2}+1$
= $x^{4}+y^{4}-2x^{2}y^{2}$
= $(x^{2}-y^{2})^{2}$
= $[(x-y)(x+y)]^{2}$
= $[(2\sqrt{a})(\frac{2}{\sqrt{a}})]^{2}$
= $16$
Hence, the correct answer is 16.

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Question : The Constitution

Option 1: is silent on the president's re-election to the office.

Option 2: allows the re-election of a person to the president's post.

Option 3: restricts a person from remaining president for only two terms.

Option 4: has been amended to allow a person only one term as president.

Team Careers360 18th Jan, 2024

Correct Answer: allows the re-election of a person to the president's post.


Solution : The correct answer is allows the re-election of a person to the president's post.

The Constitution establishes a federal, unitary, parliamentary form of government with particular elements. A person who currently holds or has previously held

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Question : Select the option that expresses the given sentence in active voice.

The deer was killed by the boar.

Option 1: The deer killed the boar.

Option 2: The boar was killing the deer.

Option 3: The boar was killed by the deer.

Option 4: The boar killed the deer.

Team Careers360 24th Jan, 2024

Correct Answer: The boar killed the deer.


Solution : The correct choice is the fourth option.

Active voice emphasises the doer of the action, while passive voice emphasises the receiver. To convert passive to active, we make the subject perform the action and rephrase the verb.

The structure of the

Question : What is the full form of ITCZ?

Option 1: Intertropical converter zone

Option 2: Intertropical convergence zone

Option 3: Intertropical centre zone

Option 4: None of these

Team Careers360 20th Jan, 2024

Correct Answer: Intertropical convergence zone


Solution : The answer is the Intertropical convergence zone.

The Intertropical Convergence Zone is the official name of the ITCZ. The Intertropical Convergence Zone, or ITCZ, is the region around the equator where the trade winds from the Northern and Southern Hemispheres converge.

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Question : A sum of money at simple interest amounts to INR 1,200 in 3 years and INR 1,350 in 4 years. The sum is:

Option 1: INR 650

Option 2: INR 850

Option 3: INR 450

Option 4: INR 750

Team Careers360 25th Jan, 2024

Correct Answer: INR 750


Solution : Total amount at the end of 4th year = INR 1,350
Total amount at the end of 3rd year = INR 1,200
Simple Interest (SI), at (4 – 3) = 1 year ⇒ (1350 – 1200) = INR 150.
⇒ SI at the end

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Question : The arithmetic mean of the following data is _________.
23, 17, 20, 19, 21

Option 1: 20

Option 2: 19

Option 3: 23

Option 4: 21

Team Careers360 20th Jan, 2024

Correct Answer: 20


Solution : Arithmetic mean
$=\frac{\text{Sum of observations}}{\text{Number of observations}}$
$=\frac{23 + 17 + 20 + 19 + 21}{5}$
$=\frac{100}{5}$
$=20$
Hence, the correct answer is 20.

44 Views

Question : Directions: Select the option that represents the letters that, when placed from left to right in the blanks below, will complete the letter series.
_RQ_PR_S_ _QSPRQ_

Option 1: PQRSPR

Option 2: PSQPRS

Option 3: PSRQPS

Option 4: PRQSPS

Team Careers360 25th Jan, 2024

Correct Answer: PSQPRS


Solution : Given:
_RQ_PR_S_ _QSPRQ_

Check the order of the letters in the given series.
To fill the series we have to divide the series –
_RQ_ / PR_S / _ _QS / PRQ_
Let's check the options –
First option: PQRSPR; PRQQ/ PR

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