Staff Selection Commission Combined Graduate Level Exam
Question : Which among the following is liquid non-metal?
Option 1: Mercury
Option 2: Bromine
Option 3: Water
Option 4: Alcohol
Correct Answer: Bromine
Solution : The correct answer is Bromine.
Bromine is a halogen found in Group 17 in the periodic table. Its atomic number is 35. It is a brown coloured non-metal which exists in the liquid state at room temperature. it is a volatile liquid i.e. it changes
Question : In the given figure, $\mathrm{O}$ is the centre of the circle and $\angle\mathrm{AOB}=130^{\circ}$. Find $\angle\mathrm{APB}$.
Option 1: $110^{\circ}$
Option 2: $115^{\circ}$
Option 3: $100^{\circ}$
Option 4: $95^{\circ}$
Correct Answer: $115^{\circ}$
Solution : Given: $\angle{AOB}=130^{\circ}$ To find $\angle{APB}$ The arc AB subtends $\angle{AOB}$ at the centre and $\angle{AQB}$ at a point Q of the remaining parts of a circle. $\therefore$ $\angle{AOB} = 2\angle{AQB}$ ⇒ $\angle{AQB} = \frac{130^\circ}{2} = 65^\circ$ In a cyclic quadrilateral, $\angle{APB}+\angle{AQB} = 180^\circ$ $\therefore$ $\angle{APB}
Question : Directions: If it is Saturday, the 27th of September, what day will it be on the 27th of October of the same year?
Option 1: Thursday
Option 2: Sunday
Option 3: Friday
Option 4: Monday
Correct Answer: Monday
Solution : Given: The 27th of September is Saturday.
Remaining days in September = 3 days Number of days in October = 27 days Total number of days = 27 + 3 = 30 days Now, divide the total number of days, i.e., 30 days by 7,
Question : Directions: The table given below shows information about bats manufactured by six different companies. Each company manufactures only plastic and wooden bats. Each company labels these bats as Brand A or Brand B. The table shows the number of plastic bats as a percentage of the total bats manufactured by each company. It also shows the ratio of wooden bats labelled A and B. Each company manufactured a total of 550000 bats.
Taking all 6 companies together, how many wooden bats of Brand A have been produced?
Option 1: 691000
Option 2: 724000
Option 3: 683000
Option 4: 716000
Correct Answer: 691000
Solution : For R, The percentage of wooden bats = 45% $\therefore$ The number of wooden bats = 0.45 × 550000 = 247500 The ratio of Brand A to Brand B for wooden bats = 21 : 4 $\therefore$ The number of Brand A wooden bats =
Question : Direction: Select the missing number from the given alternatives.
Option 1: 468
Option 2: 456
Option 3: 268
Option 4: 256
Correct Answer: 256
Solution : Given:
In the second column, 23 = 8, 26 = 64, 29 = 512. Here, 3, 6, and 9 are in AP.
In the third column, 24 = 16, 27 =
Question : Suppose $\triangle ABC$ be a right-angled triangle where $\angle A=90°$ and $AD\perp BC$. If the area of $\triangle ABC =40$ cm$^{2}$ and $\triangle ACD =10$ cm$^{2}$ and $\overline{AC}=9$ cm, then the length of $BC$ is:
Option 1: 12 cm
Option 2: 18 cm
Option 3: 4 cm
Option 4: 6 cm
Correct Answer: 18 cm
Solution : According to the question, Given: AC = 9 cm Area of $\triangle$ABC = 40 cm2 Area of $\triangle$ADC = 10 cm2 $\triangle$BAC ∼ $\triangle$ADC ⇒ $\frac{\text{Area of }\triangle ABC}{\text{Area of } \triangle ADC}=\frac{AB^{2}}{AD^{2}}=\frac{BC^{2}}{AC^{2}}$ (In similar triangles, the ratio of their area is
Question : Directions: In this question, a part of the sentence is in bold. Below are given alternatives to the bold part at (1), (2) and (3) which may improve the sentence. Choose the correct alternative in case no improvement is needed your answer is (4).
Maggie took a hot bath because she was working in the garden all afternoon.
Option 1: 1
Option 2: 2
Option 3: 3
Option 4: 4
Correct Answer: 3
Solution : The third option is the correct answer.
It uses the past perfect continuous tense "had been", which is appropriate because it indicates that the action of working in the garden was completed before the action of taking a bath.
So, the correct sentence should be:
Question : The ratio of the cost price and selling price of an article is 10 : 11. The gain percentage is:
Option 1: 10%
Option 2: 8%
Option 3: 5%
Option 4: 15%
Correct Answer: 10%
Solution : Let the cost price and selling price be $10x$ and $11x$, respectively. Profit percentage = $\frac{\text{Selling Price – Cost Price}}{\text{Cost Price}}\times 100$ = $\frac{11x-10x}{10x}\times100$ = $\frac{x}{10x}\times100$ = 10% Hence, the correct answer is 10%.
Question : Directions: In the following question, out of the four alternatives, select the alternative that will improve the bracketed part of the sentence. In case no improvement is needed, select "No Improvement".
The student (told her teacher) to explain the passage.
(1) asked her teacher
(2) said to her teacher
(3) conveyed to her teacher
(4) No Improvement
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (1)
Solution : The sentence can be improved using the first option.
"Asked her teacher" is the best choice because it makes the sentence more direct and clearer, expressing the student's request for an explanation from the teacher.
Therefore, the correct sentence would be: The student asked
Question : Select the option that expresses the given sentence in passive voice. The courier boy did not deliver the parcel.
Option 1: The parcel did not deliver by the courier boy.
Option 2: The parcel had not been delivered by the courier boy.
Option 3: The parcel had not delivered by the courier boy.
Option 4: The parcel was not delivered by the courier boy.
Correct Answer: The parcel was not delivered by the courier boy.
Solution : The correct choice is the fourth option.
Explanation: The original sentence is in active voice. To convert it to passive voice, the object of the active sentence becomes the subject of the passive sentence,
The
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