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Staff Selection Commission Combined Graduate Level Exam

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Question : The distance between the centres of two circles having radii 16 cm and 8 cm, is 26 cm. The length (in cm) of the direct common tangent of the two circles is:

Option 1: $2 \sqrt{132}$

Option 2: $\sqrt{153}$

Option 3: $2 \sqrt{153}$

Option 4: $\sqrt{132}$

Team Careers360 24th Jan, 2024

Correct Answer: $2 \sqrt{153}$


Solution :
Given:
The radius of the bigger circle $r_1= 16$
The radius of the smaller circle $r_2= 8$
Distance between the centres, $d = 26$
So, the length of the direct common tangent, $l = \sqrt{d^2-(r_1-r_2)^2}$
$= \sqrt{26^2-(16-8)^2}$
$=\sqrt{676-64}$
$= \sqrt{612}$
$=2\sqrt{153}$
So, the length

16 Views

Question : Direction: In the following question, a series is given with one or more alphabet missing. Choose the correct alternative from the given options.

DF, GJ, KM, NQ, RT, ?

Option 1: EI

Option 2: UX

Option 3: UV

Option 4: XY

Team Careers360 21st Jan, 2024

Correct Answer: UX


Solution : Given:
DF, GJ, KM, NQ, RT, ?

First term→ DF → D + 2 = F

Second term → GJ → F + 1 = G; G + 3 = J

Third term → KM → J + 1 = K; K + 2

30 Views

Question : Directions: In a certain code language, CAKES is written as FXNBV, and ABUSE is written as DYXPH. How will BARKS be written in that language?

Option 1: EXVHU

Option 2: EXUIU

Option 3: EXUIV

Option 4: EXUHV

Team Careers360 24th Jan, 2024

Correct Answer: EXUHV


Solution : Given:
CAKES is written as FXNBV and ABUSE is written as DYXPH.

Add and subtract 3 alternately from the place value of each letter of CAKES to obtain the required code –
C + 3 = F; A – 3 = X; K + 3

7 Views

Question : Directions: Select the option figure in which the given figure is embedded. (Rotation is NOT allowed)

Option 1:

Option 2:

Option 3:

Option 4:

Team Careers360 14th Jan, 2024

Correct Answer:


Solution : Since the rotation of the figure is not allowed, we will check where the question figure can exactly fit itself in the given option figures.

From the above, it is clear that the given question figure is embedded in the second option figure. Hence, the second

26 Views

Question : A spherical ball of lead, 3 cm in diameter, is melted and recast into three spherical balls. The diameters of two of these balls are $\frac{3}{2}$ cm and 2 cm, respectively. Find the diameter of the third ball.

Option 1: 2.1 cm

Option 2: 3.3 cm

Option 3: 3 cm

Option 4: 2.5 cm

Team Careers360 25th Jan, 2024

Correct Answer: 2.5 cm


Solution : Given:
A spherical ball of lead, 3 cm in diameter, is melted and recast into three spherical balls.
Radius = $\frac{3}{2}$ cm
So, the volume of the sphere = $\frac{4}{3}\pi r^3=\frac{4}{3}\pi (\frac{3}{2})^3$ cm3
The diameters of two of the new balls are $\frac{3}{2}$

143 Views

Question : A mixture of acid and water contains 20% acid. When 10 litres of water is added to the mixture, then the percentage of acid becomes 15%. What is the original quantity of the mixture?

Option 1: 30 litres

Option 2: 25 litres

Option 3: 40 litres

Option 4: 35 litres

Team Careers360 15th Jan, 2024

Correct Answer: 30 litres


Solution : Given: A mixture of acid and water contains 20% acid.
The mixture's ratio = $\frac{(\text{20% acid})}{(\text{80% water})}$ = $\frac{20}{80}$ = 1 : 4.
Let there be $x$ litres of acid in the mixture. Additionally, $4x$ litres of water should be added to the mixture.

22 Views

Question : Directions: In the following question, some parts of the sentence have errors, and some are correct. Find out which part of the sentence has an error. The number of that part is the answer. If a sentence is error-free, your answer is "No Error".

He flowed into a rage (1)/ at the very (2)/ sight of that man. (3)/ No Error (4)

Option 1: 1

Option 2: 2

Option 3: 3

Option 4: 4

Team Careers360 22nd Jan, 2024

Correct Answer: 1


Solution : The first option is the correct answer.

"To fly into a rage" means to suddenly become very angry or lose one's temper explosively or uncontrollably. It describes a rapid and intense escalation of anger or fury. In the third part of the sentence, "flowed" must

17 Views

Question : If $\sin 23^{\circ}=\frac{a}{b}$, the value of $\sec 23^{\circ}-\sin 67^{\circ}$ is:

Option 1: $\frac{a^2}{\sqrt{b^2-a^2}}$

Option 2: $\frac{b^2-a^2}{a b}$

Option 3: $\frac{a^2}{b\sqrt{b^2+a^2}}$

Option 4: $\frac{a^2}{b \sqrt{b^2-a^2}}$

Team Careers360 17th Jan, 2024

Correct Answer: $\frac{a^2}{b \sqrt{b^2-a^2}}$


Solution :
Given: $\sin 23^{\circ}=\frac{a}{b}$
To find: $\sec 23^{\circ}-\sin 67^{\circ}$
By using the figure in the form of a perpendicular, base, and hypotenuse.
$\sin 23^{\circ}=\frac{p}{h} =\frac{a}{b}$
So, base$=\sqrt{b^2-a^2}$
$\sec 23^{\circ} =\frac{b}{\sqrt{b^2-a^2}}$
$\sin 67^{\circ}=\frac{\sqrt{b^2-a^2}}{b}$
Putting the values, we get:
$\sec 23^{\circ}-\sin 67^{\circ}$ =$\frac{b}{\sqrt{b^2-a^2}}-\frac{\sqrt{b^2-a^2}}{b}$
= $\frac{a^2}{b \sqrt{b^2-a^2}}$
Hence,

23 Views

Question : Which of the following is a festival of merriment and heralds the Assamese New Year and the onset of spring?

Option 1: Ali-Ai-Ligang

Option 2: Me-Dam-Me-Phi

Option 3: Bohag Bihu

Option 4: Kati Bihu

Team Careers360 19th Jan, 2024

Correct Answer: Bohag Bihu


Solution : The correct answer is Bohag Bihu.

The boisterous celebration, known as the Bohag Bihu or Rongali Bihu, heralds the arrival of spring and the Assamese New Year. Important holidays in Assam include Baikho, Rongker, Baishagu, Bihu, Ali-Ai-Ligang, and Rajini Gabra.

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