Staff Selection Commission Sub Inspector Exam
Question : P and Q can do a work together in 30 days. Q and R can do the same work together in 24 days and R and P together in 20 days. They started the work together, but Q and R left after 10 days. How many more days will P take to finish the remaining work?
Option 1: 23
Option 2: 21
Option 3: 18
Option 4: 19
Correct Answer: 18
Solution : LCM of 30, 24 and 20 = 120 Total work = 120 units Efficiency of (P + Q) = $\frac{120}{30}=4$ units/day Efficiency of (Q + R) = $\frac{120}{24}=5$ units/day Efficiency of (R + P) = $\frac{120}{20}=6$ units/day Now, (P + Q) + (Q + R)
Question : The remainder when $75 \times 73 \times 78 \times 76$ is divided by 34 is:
Option 1: 15
Option 2: 18
Option 3: 22
Option 4: 12
Correct Answer: 12
Solution : $\frac{ (75 × 73 × 78 × 76)}{34}$ Divide each number individually by 34 and break it into a small number. $\frac{75}{34} \times \frac{73}{34} \times \frac{78}{34} \times \frac{76}{34}$ Remainders = $7 × 5 × 10 × 8$ Again, $\frac{35 \times 80}{34}$ ⇒ $\frac{35}{34} \times \frac{80}{34}$
Question : ‘Mein Kampf’ of Adolf Hitler was originally written in which of the following languages?
Option 1: Japanese
Option 2: English
Option 3: German
Option 4: French
Correct Answer: German
Solution : The correct option is German
"Mein Kampf" was originally written in German. Adolf Hitler wrote the book during his imprisonment in 1923–1924, and it outlines his political ideology and views. The title translates to "My Struggle" in English. In "Mein Kampf," Hitler expressed his hatred
Question : An article was sold at a loss of 13.5%. If it was sold for INR 1,104 more, then there would have been a profit of 9.5%. The cost price of the article was:
Option 1: INR 4,600
Option 2: INR 4,800
Option 3: INR 4,400
Option 4: INR 4,200
Correct Answer: INR 4,800
Solution : Let $x$ be the cost price. Loss = 13.5% of cost price = $0.135x$ Selling price = cost price – loss = $x-0.135x$ = $0.865x$ When selling price = $0.865x$ + INR 1,104, Profit = 9.5% of cost price = $0.095x$ Cost price =
Question : Which of the following places is well-known for the embroidery form of "Chikankari "?
Option 1: Hyderabad.
Option 2: Jaipur.
Option 3: Bhopal.
Option 4: Lucknow.
Correct Answer: Lucknow.
Solution : The Correct Answer is Lucknow
Chikankari is a traditional craft form in Lucknow. The threadwork is the most important aspect of this needlework. It is the key reason for its appeal.The patterns and effects produced are determined by the stitches and thread thicknesses employed. According
Question : In two circles centred at O and O’, the distance between the centres of both circles is 17 cm. The points of contact of a direct common tangent between the circles are P and Q. If the radii of both circles are 7 cm and 15 cm, respectively, then the length of PQ is equal to:
Option 1: 15 cm
Option 2: 17 cm
Option 3: 10 cm
Option 4: 22 cm
Correct Answer: 15 cm
Solution : Length of direct common tangent =$\sqrt{(\text{Distance between centre of circles })^2-\text{(Difference between radius of two circles})^2}$
Square of difference between radius of two circles = $(15 -7)^2 = 8^2 = 64$ Length of direct common tangent, PQ = $\sqrt{17^2 - 64} = \sqrt{289-64} =
Question : Directions: Select the option in which the words share the same relationship as that shared by the given pair of words. Players : Team
Option 1: Class : Students
Option 2: Flowers : Bouquet
Option 3: Grapes : Dozen
Option 4: Band : Musician
Correct Answer: Flowers : Bouquet
Solution : Given: Players : Team (This depicts the relation as the first word is a group for the second word; A group of players is called a team.)
Let's check each option – First option: Class : Students; A group of students is known
Question : According to Darwin's Theory of Evolution, long necks in giraffes:
Option 1: arose because of constant attempts to reach leaves on tall trees, generation after generation
Option 2: do not give them any special advantage, and is just an accident
Option 3: give them an advantage in finding food, because of which those with long necks survive
Option 4: is a result of the special weather prevalent in African Savannah
Correct Answer: arose because of constant attempts to reach leaves on tall trees, generation after generation
Solution : The correct option is arose because of the constant attempt to reach leaves on tall trees, generation after generation.
According to Charles Darwin's Theory of Evolution, the long neck of a
Question : Rashtrapati Bhawan was designed by
Option 1: Edward C. Stone
Option 2: Le Corbusier
Option 3: Edwin Lutyens
Option 4: Tarun Dutt
Correct Answer: Edwin Lutyens
Solution : The correct option is Edwin Lutyens.
Edwin Lutyens was a British designer. Rashtrapati Bhavan was built in 1931. Lutyens played a key role in the planning and construction of New Delhi as the capital of British India. Previously, the term Viceroy's House was
Question : Called the farmer’s ‘friend’, the ______ helps in the breakdown of complex organic matter as well as in the loosening of the soil.
Option 1: locust
Option 2: earthworm
Option 3: rat
Option 4: weed
Correct Answer: earthworm
Solution : The correct answer is earthworm.
Called the farmer's 'friend,' the earthworm helps in the breakdown of complex organic matter as well as in loosening the soil. Earthworms are considered beneficial to agriculture as they enhance soil fertility by decomposing organic material, promoting aeration, and creating
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