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Staff Selection Commission Combined Graduate Level Exam

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Question : Two chords of lengths $a$ metre and $b$ metre subtend angles $60^{\circ}$ and $90^{\circ}$ at the centre of the circle, respectively. Which of the following is true?

Option 1: $b=\sqrt{2}a$

Option 2: $a=\sqrt{2}b$

Option 3: $a=2b$

Option 4: $b=2a$

Team Careers360 8th Jan, 2024

Correct Answer: $b=\sqrt{2}a$


Solution : The length of a chord in a circle,
$=2×r×\sin \left(\frac{\theta}{2}\right)$
Where $r$ is the radius of the circle and $\theta$ is the angle subtended at the centre by the chord.
Given that the lengths of the chords are $a$ and $b$ meters, they subtend angles

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Question : In the early nineteenth century, who demonstrated that there are fourteen space lattices, or regularly repeating arrangements of points in space, that differ in symmetry and geometry?

Option 1: Auguste Bravais

Option 2: William Bragg

Option 3: Jerome Karle

Option 4: Charles Frank

Team Careers360 17th Jan, 2024

Correct Answer: Auguste Bravais


Solution : The correct option is Auguste Bravais.

Auguste Bravais was a French physicist who made significant contributions to Crystallography. Bravais' work on lattices and their classification was instrumental in understanding the structure of crystalline materials.

19 Views

Question : Directions: Three of the following four-letter clusters are alike in a certain way and one is different. Pick the odd one out.

Option 1: ONL

Option 2: RQO

Option 3: HGE

Option 4: DCB

Team Careers360 21st Jan, 2024

Correct Answer: DCB


Solution : Let's check the options –
First option: ONL; O – 1 = N; N – 2 = L
Second option: RQO; R – 1 = Q; Q – 2 = O
Third option: HGE; H – 1 = G; G – 2 = E
Fourth

19 Views

Question : If $x^{2} -3x +1=0$, then the value of $\frac{\left(x^4+\frac{1}{x^2}\right)}{\left(x^2+5 x+1\right)}$ is:

Option 1: $\frac{9}{4}$

Option 2: $\frac{27}{8}$

Option 3: $\frac{5}{2}$

Option 4: $2$

Team Careers360 12th Jan, 2024

Correct Answer: $\frac{9}{4}$


Solution : Given:
$x^{2} -3x +1=0$
$⇒x^{2} +1 = 3x$
Dividing $x$ on both sides, we get,
$⇒x + \frac{1}{x} = 3$
Cubing both sides, we get,
$⇒(x+\frac{1}{x})^3=3^3$
$⇒x^3+\frac{1}{x^3}+3×x×\frac{1}{x}(x+\frac{1}{x})=27$
$⇒x^3+\frac{1}{x^3}+3×3=27$
$⇒x^3+\frac{1}{x^3}=18$
Now,
$ \frac{x^4 +\frac{1}{x^2}}{x^2 + 5x + 1}$
$= \frac{x(x^3 +\frac{1}{x^3})}{x(x + 5 + \frac{1}{x})}$
$=

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Question : Match the columns.

Institutions Headquarters
(A) ICAR-Central Institute for Arid Horticulture (I) Bikaner
(B) ICAR-Central Institute of Cotton Research (II) Nagpur
(C) ICAR-National Rice Research Institute (III) Cuttack
(D) ICAR-Indian Institute of Horticultural Research (IV) Bengaluru

Option 1: A-I, B-II, C-III, D-IV

Option 2: A-I, B-II, C-IV, D-III

Option 3: A-IV, B-III, C-I, D-II

Option 4: A-IV, B-III, C-II, D-I

Team Careers360 10th Jan, 2024

Correct Answer: A-I, B-II, C-III, D-IV


Solution : The correct answer is A-I, B-II, C-III, D-IV.

(A) ICAR-Central Institute for Arid Horticulture in Bikaner focus on arid region horticulture research.

(B) ICAR-Central Institute of Cotton Research in Nagpur specialises in cotton research and technology.

(C) ICAR-National Rice Research Institute in

18 Views

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.

He has the full facts ______ but is deliberately hiding them.

Option 1: up his sleeve

Option 2: under his sleeves

Option 3: upon his sleeves

 

Option 4: in his sleeves

Team Careers360 19th Jan, 2024

Correct Answer: up his sleeve


Solution : The correct answer is in option one.

The correct sentence is: 

He has the full facts up his sleeve but is deliberately hiding them.

This sentence is effective because it conveys the speaker's suspicion and frustration. It also suggests that the other person

19 Views

Question : In $\triangle A B C,\ D$ is the mid-point of $BC$ and $G$ is the centroid. If $G D = 10\ \text{cm} $, the length of $AD$ is_____.

Option 1: 20 cm

Option 2: 30 cm

Option 3: 15 cm

Option 4: 10 cm

Team Careers360 5th Jan, 2024

Correct Answer: 30 cm


Solution :
The centroid divides each median into two segments whose lengths are in the ratio of 2 : 1.
$GD$ = 10 cm
Let the length of $AG$ be $x$.
$\therefore \frac{2}{1} = \frac{x}{10}$
$\Rightarrow x = 20\ \text{cm}$
Now, $AD = GD + AG

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