Staff Selection Commission Sub Inspector Exam
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
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.
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
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
Question : Directions: A graph showing the price of rice in India during the years 2000 to 2003 is given below. Study the graph carefully and answer the questions.
The month in which the price of rice was equal for the year 2000 and 2001 was:
Option 1: September
Option 2: August
Option 3: June
Option 4: November
Correct Answer: June
Solution : On the basis of given table in question, The price of rice were equal for the year 2000 and 2001 in month June which was 21. Hence, the correct answer is June.
Question : Directions: A family consists of six members A, B, C, D, E, and F. There are two married couples. B is a doctor and the father of E. F is the grandfather of C and is a contractor, and D is the grandmother of E and is a housewife. There is one doctor, one contractor, one nurse, one housewife, and two students in the family. What is the profession of A?
Option 1: Doctor
Option 2: Contractor
Option 3: Nurse
Option 4: Housewife
Correct Answer: Nurse
Solution : According to the given information, the family tree is as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.
So, from the above family tree, A is a nurse by profession. Hence, the third option is
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
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
Question : The SI (International System of Units) unit of length is______.
Option 1: metre
Option 2: centimetre
Option 3: millimetre
Option 4: kilometre
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
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
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.
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
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
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
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:
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
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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