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Staff Selection Commission Combined Graduate Level Exam

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Question : Three cubes of equal volume are joined end to end. Find the surface area of the resulting cuboid if the diagonal of the cube is $6 \sqrt{3} \mathrm{~cm}$.

Option 1: 509 cm2

Option 2: 504 cm2

Option 3: 516 cm2

Option 4: 512 cm2

Team Careers360 15th Jan, 2024

Correct Answer: 504 cm2


Solution : Diagonal of cube = $\sqrt{3}$ × side 
⇒ $6\sqrt{3}$ = Side × $\sqrt{3}$
⇒ Side = 6 cm
So, length of cuboid, l = 3 × 6 = 18 cm
Breadth, b = 6 cm and height, h= 6 cm
So, the surface

12 Views

Question : If $x$,$y$ and $z$ are real numbers such that $(x-3)^2+(y-4)^2+(z-5)^2=0$, then $(x+y+z)$ is equal to:

Option 1: –12

Option 2: 0

Option 3: 8

Option 4: 12

Team Careers360 20th Jan, 2024

Correct Answer: 12


Solution : Given: $x,y$ and $z$ are real numbers such that $(x-3)^2+(y-4)^2+(z-5)^2=0$
We know,
The addition of three perfect squares can be zero only when the individual numbers are zero.
So, $(x-3)^2=0, (y-4)^2=0$ and $(z-5)^2=0$
⇒ $x = 3, y = 4$ and $z = 5$.
Then,

32 Views

Question : Let $0^{\circ}<\theta<90^{\circ}$, $\left(1+\cot ^2 \theta\right)\left(1+\tan ^2 \theta\right) × (\sin \theta-\operatorname{cosec} \theta)(\cos \theta-\sec \theta)$ is equal to:

Option 1: $ \sin \theta+\cos \theta$

Option 2: $\sin \theta \cos \theta$

Option 3: $\sec \theta \operatorname{cosec} \theta$

Option 4: $\sec \theta+\operatorname{cosec} \theta$

Team Careers360 14th Jan, 2024

Correct Answer: $\sec \theta \operatorname{cosec} \theta$


Solution : $\left(1+\cot ^2 \theta\right)\left(1+\tan ^2 \theta\right) × (\sin \theta-\operatorname{cosec} \theta)(\cos \theta-\sec \theta)$
$=\operatorname{cosec}^2\theta×\sec^2\theta(\sin\theta-\frac{1}{\sin\theta})(\cos\theta-\frac{1}{\cos\theta})$
[$\because 1+\cot ^2 \theta=\operatorname{cosec}^2\theta$ and $1+\tan ^2 \theta=\sec^2\theta$]
$=\frac{1}{\sin^2\theta}×\frac{1}{\cos^2\theta}(\frac{\sin^2\theta-1}{\sin\theta})(\frac{\cos^2\theta-1}{\cos\theta})$
$=\frac{1}{\sin^2\theta}×\frac{1}{\cos^2\theta}(\frac{-\cos^2\theta}{\sin\theta})(\frac{-\sin^2\theta}{\cos\theta})$
$=\sec \theta \operatorname{cosec} \theta$
Hence, the correct answer is $\sec \theta \operatorname{cosec} \theta$.

18 Views

Question : If $\cos \theta=\frac{12}{13}$, then the value of $\frac{\sin \theta(1-\tan \theta)}{\tan \theta(1+\operatorname{cosec} \theta)}$ is:

Option 1: $\frac{25}{78}$

Option 2: $\frac{35}{234}$

Option 3: $\frac{35}{108}$

Option 4: $\frac{25}{156}$

Team Careers360 14th Jan, 2024

Correct Answer: $\frac{35}{234}$


Solution : Given:
$\cos \theta=\frac{12}{13}$
We know that,
$\cos \theta=\frac{\text{Base}}{\text{Hypotenuse}}=\frac{12}{13}$
Using Pythagoras theorem, we get, Perpendicular = $\sqrt{13^2-12^2}=5$
$\sin \theta=\frac{\text{Perpendicular}}{\text{Hypotenuse}}=\frac{5}{13}$
$\tan \theta=\frac{\text{Perpendicular}}{\text{Base}}=\frac{5}{12}$
$\operatorname{cosec} \theta=\frac{1}{\sin \theta}=\frac{13}{5}$
Now,
$\frac{\sin \theta(1-\tan \theta)}{\tan \theta(1+\operatorname{cosec} \theta)}$
$= \frac{\frac{5}{13}(1-\frac{5}{12})}{\frac{5}{12}(1+\frac{13}{5})}$
$= \frac{\frac{5}{13}\times \frac{7}{12}}{\frac{5}{12}\times \frac{18}{5}}$
$=\frac{35}{234}$
Hence, the correct answer is $\frac{35}{234}$.

17 Views

Question : Directions: A # B means A is the brother of B. A @ B means A is the daughter of B. A & B means A is the husband of B and A % B means A is the wife of B. If D @ N @ H & Y @ F % V, then how is N related to F?

Option 1: Daughter's daughter

Option 2: Daughter

Option 3: Sister's daughter

Option 4: Son's wife

Team Careers360 18th Jan, 2024

Correct Answer: Daughter's daughter


Solution : As per the given information, the family tree will be as follows –

Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.

So, from the above family tree, N is the daughter's daughter (granddaughter) of F. Hence,

113 Views

Question : Directions: Select the option that represents the correct order of the given words as they would appear in the English dictionary.
1. Warriors
2. Warehouse
3. Warcraft
4. Warranty
5. Wardrobe
6. Wardenship

Option 1: 3, 6, 5, 2, 1, 4

Option 2: 3, 5, 6, 2, 1, 4

Option 3: 3, 5, 6, 2, 4, 1

Option 4: 3, 6, 5, 2, 4, 1

Team Careers360 13th Jan, 2024

Correct Answer: 3, 6, 5, 2, 4, 1


Solution : Given:
1. Warriors 2. Warehouse 3. Warcraft 4. Warranty 5. Wardrobe 6. Wardenship

Step 1: The first, second, and third letters of all the words are the same, so move on to the next letter.
Step 2: The fourth letter

16 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 completed all projects on time except for two of them which he found too difficult to ________.

Option 1: Embrace

Option 2: Comprehend

Option 3: Acknowledge

 

Option 4: Discern

Team Careers360 15th Jan, 2024

Correct Answer: Comprehend


Solution : To complete the sentence correctly, we need a word that indicates that the person found those two projects too difficult to understand or grasp. The word "comprehend" means to understand fully or grasp the meaning of something.

So, the correct sentence is: "He completed all

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