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Staff Selection Commission Sub Inspector Exam

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Question : If $(\frac{1}{5})^{3y}=0.008$, then the value of $(0.25)^{y}$ is:

Option 1: 0.25

Option 2: 6.25

Option 3: 2.5

Option 4: 53

Team Careers360 16th Jan, 2024

Correct Answer: 0.25


Solution : $(\frac{1}{5})^{3y}=0.008$
⇒ $0.2^{3y}=0.2^3$
⇒ $3y=3$
⇒ $y=1$
$\therefore (0.25)^{y}=(0.25)^{1}=0.25$
Hence, the correct answer is 0.25.

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Question : If the LCM of two numbers a and b is 60 and their HCF is 15. Determine their mean proportion.

Option 1: 30

Option 2: 25

Option 3: 60

Option 4: 4

Team Careers360 14th Jan, 2024

Correct Answer: 30


Solution : The mean proportion of two numbers a and b is given by the square root of the product of a and b.
Given that the least common multiple (LCM) of a and b is 60 and their highest common factor (HCF) is 15.
⇒ a

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Question : How many medals in total did India win at the Summer Olympic Games in 2012?

Option 1: 2

Option 2: 6

Option 3: 3

Option 4: 4

Team Careers360 14th Jan, 2024

Correct Answer: 6


Solution : The correct answer is 6.

India's 2012 Summer Olympics marked a historic achievement, doubling its previous record with a total of six medals, including two silver and four bronze. Notably, the nation's first female athletes to secure Olympic medals in the same Games were

22 Views

Question : The SI (International System of Units) unit of length is______.

Option 1: metre

Option 2: centimetre

Option 3: millimetre

Option 4: kilometre

Team Careers360 15th Jan, 2024

Correct Answer: metre


Solution : The correct answer is metre.

The metre is the unit of length in the SI (International System of Units). The most widely used measurement system is the International System of Units (SI), which is the current equivalent of the metric system based on the

25 Views

Question : The curved surface area of a cone whose base radius is 7 cm and slant height is 10 cm is:

Option 1: 280 cm2

Option 2: 250 cm2

Option 3: 300 cm2

Option 4: 220 cm2

Team Careers360 14th Jan, 2024

Correct Answer: 220 cm2


Solution : Give: Radius = 7 cm
Slant height = 10 cm
The curved surface area of a cone = $\pi rl$
= $\frac{22}{7}\times7\times10$
= 220 cm2
Hence, the correct answer is 220 cm2.

20 Views

Question : In $\Delta \mathrm{ABC}$, a line parallel to side $\mathrm{BC}$ cuts the sides $\mathrm{AB}$ and $\mathrm{AC}$ at points $\mathrm{D}$ and $\mathrm{E}$ respectively and also point $\mathrm{D}$ divides $\mathrm{AB}$ in the ratio of $\mathrm{1 : 4}$. If the area of $\Delta \mathrm{ABC}$ is $200\;\mathrm{cm^2}$, then what is the area (in $\mathrm{cm^2}$) of quadrilateral $\mathrm{DECB}$?

Option 1: 192

Option 2: 50

Option 3: 120

Option 4: 96

Team Careers360 12th Jan, 2024

Correct Answer: 192


Solution :
Given: $\mathrm{AD:DB=1:4}$ and the area of $\Delta \mathrm{ABC}$ is $200\;\mathrm{cm^2}$.
In $\Delta \mathrm{ABC}$,
$\mathrm{DE}\parallel\mathrm{BC}$
So, $\Delta \mathrm{ADE}\sim\Delta \mathrm{ABC}$,
The ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides.
⇒ $\frac{\text{Area of $\Delta \mathrm{ADE}$}}{{\text{Area of

14 Views

Question : Comprehension:
Read the given passage and answer the questions that follow.

Ghana was the first true African state. The reason why we are saying this is that most African states lived in tribal villages but Ghana was the centre of the gold trade. This gold trade opened new possibilities for the Ghanaians. The gold trade roots back to the 4th century, when African Soninke tribes were under the rule of the Maga, a Berber clan originating from Morocco. This clan has mastered trans-Saharan camel travel. They were known for trading salt for gold from the Soninke.

When the Arabs invaded North Africa, there was an upsurge in the trade in gold. Ghana became rich and soon after, the Soninke ousted the Maga and built their own nation under Kaya Magan Cisse, who became the Soninke king around 790.

Ghana’s ancient capital, Koumbi Salah, was the city where Africans and Berbers met and traded. Arab traders in the 9th century described Ghana as ‘the land of gold.’ The gold came from Asante and Senegal to the south and west. The trade routes led north and east to Morocco, Libya Aksum and so on to Europe and Asia.

Ghana had reached its peak in the 10th century. This was the country which controlled both the gold and salt trades. Other trading goods included woollen clothes, luxury items, leather goods and slaves. Traders transported goods hundreds of kilometres across the Sahara desert with camel caravans.

Question:
Select the most appropriate ANTONYM of the given word.
Controlled

Option 1: Profuse

Option 2: Promise

Option 3: Practicality

Option 4: Agitated

Team Careers360 25th Jan, 2024

Correct Answer: Agitated


Solution : The correct choice is the fourth option.

The word controlled implies restraint, regulation, or a state of being managed or directed. On the other hand, the antonym agitated suggests a state of excitement, nervousness, or unrest.

The meanings of the other options are as follows:

9 Views

Question : The length of the shadow of a vertical pole on the ground is 36 m. If the angle of elevation of the sun at that time is $\theta$. Such that $\sec \theta=\frac{13}{12}$, then what is the height (in m) of the pole?

Option 1: 12

Option 2: 15

Option 3: 18

Option 4: 9

Team Careers360 12th Jan, 2024

Correct Answer: 15


Solution :
The angle of elevation of the sun and the height of the pole form a right triangle with the length of the shadow.
Given that $\sec \theta = \frac{13}{12}$,
$⇒\cos \theta = \frac{1}{\sec \theta} = \frac{12}{13}$
Since $\cos^2 \theta + \sin^2 \theta = 1$.
$⇒\sin

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