Staff Selection Commission Combined Graduate Level Exam
Question : If the radius of a sphere is decreased by 48%, then by what percentage does its surface area decrease?
Option 1: 82.91%
Option 2: 72.96%
Option 3: 78.98%
Option 4: 86.26%
Correct Answer: 72.96%
Solution : Given: the radius of a sphere is decreased by 48%. Let the radius be $r$, then the surface area of the sphere = $4\pi r^2$ Now the radius has decreased by 48%, So, the radius = $r-0.48r$ = $0.52r$ And the new area = $4\pi
Question : Single-celled life forms were discovered by Antonie van Leeuwenhoek in _______.
Option 1: 1774
Option 2: 1884
Option 3: 1837
Option 4: 1674
Correct Answer: 1674
Solution : The correct option is 1674.
Single-celled life forms were discovered by Antonie van Leeuwenhoek in the late 17th century. Specifically, he made this discovery in 1674. Van Leeuwenhoek was a Dutch scientist and is often considered one of the pioneers of microbiology for his
Question : Directions: In the following question, two statements are given followed by two conclusions I and II. You have to consider the two statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow from the given statements. Statements: All animals are four-footed. The dog has two legs. Conclusions: I. The dog is not an animal. II. The dog is an animal.
Option 1: Only I follows
Option 2: Only II follows
Option 3: Neither I nor II follows
Option 4: Both I and II follow
Correct Answer: Only I follows
Solution : Based on the given statements, let's analyse the conclusions – Conclusion I: The dog is not an animal – According to the given statements, all animals are four-footed and the dog has two legs. So, from this, it can be concluded that a
Question : Directions: Select the set in which the numbers are related in the same way as the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc., to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed.) (4, 16, 8); (2, 14, 9)
Option 1: (2, 8, 10)
Option 2: (2, 8, 6)
Option 3: (2, 8, 16)
Option 4: (2, 8, 1)
Correct Answer: (2, 8, 6)
Solution : Given: (4, 16, 8); (2, 14, 9)
Here, (4, 16, 8)→16 ÷ 4 = 4; 4 + 4 = 8 (2, 14, 9)→14 ÷ 2 = 7; 2 + 7 = 9
Let's check the options – First option: (2, 8, 10)→8 ÷
Question : Select the correct direct form of the given sentence. The policeman warned us not to block the traffic.
Option 1: The policeman said to us, "Let us not block the traffic."
Option 2: . The policeman said to us, "You did not block the traffic."
Option 3: The policeman said to us, "We should not block the traffic."
Option 4: The policeman said to us, "Do not block the traffic."
Correct Answer: The policeman said to us, "Do not block the traffic."
Solution : The fourth option is the correct choice.
The given sentence is indirect speech. The steps for changing or converting indirect speech into direct speech are:
Question : A computer executes programs in the sequence of :
Option 1: Execute, Fetch, Decode
Option 2: Store, Fetch, Execute
Option 3: Fetch, Decode, Execute
Option 4: Decode, Fetch, Execute
Correct Answer: Fetch, Decode, Execute
Solution : The Correct Answer is- Fetch, Decode, Execute
The instruction cycle is divided into four steps: reading the address from memory, decoding the fetched instruction, and finally, executing the instruction. It is completed by the computer processor. The central processing unit keeps doing it
Question : Select the most appropriate ANTONYM of the given word.
Exemplary
Option 1: Flattering
Option 2: Unsatisfactory
Option 3: Imitative
Option 4: Desirable
Correct Answer: Unsatisfactory
Solution : The correct choice is the second option.
Exemplary means that something is serving as a desirable model and that you think it is extremely good.
The meanings of the other words are as follows:
Question : Directions: Select the figure from among the given options that can replace the question mark (?) in the following series.
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : In the given figure, follow the directions to find the next term –
In Box 1, there are two letters, A and B, placed diagonally. A is in the southwest, while B is in the northeast. There is a square at the centre of the box,
Question : Directions: Select the correct mirror image of the given combination when the mirror is placed at line MN as shown.
Solution : As per the mirror image properties, closer things appear close to the mirror in the reflection. Here, according to the information provided, the mirror is placed on the right side of the figure (on line MN). So, the left side of the reflected image will appear
Question : The compound ratio of the inverse ratio of the ratios $x:yz, y:xz$ and $z:xy$ is:
Option 1: $1:xyz$
Option 2: $xyz:1$
Option 3: $1 : 1$
Option 4: $x:yz$
Correct Answer: $xyz:1$
Solution : The inverse of $a$ is $\frac{1}{a}$ and a compound ratio is the ratio obtained when we compound two or more ratios through multiplication. For two ratios $m:n$ and $p:q$, the compound ratio is $mp:nq$. The inverse ratio of the ratios, $x:yz,y:xz$ and $z:xy$ is $yz:x,xz:y$
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