Staff Selection Commission Sub Inspector Exam
Question : The ratio between the two numbers is 3 : 4. If each number is increased by 6, the ratio becomes 4 : 5. What is the difference of the numbers?
Option 1: 1
Option 2: 3
Option 3: 6
Option 4: 8
Correct Answer: 6
Solution : Given: The ratio between the two numbers is 3 : 4. If each number is increased by 6, the ratio becomes 4 : 5. Let the numbers be $3x$ and $4x$. As per given conditions, ⇒ $\frac{3x+6}{4x+6}=\frac{4}{5}$ ⇒ $15x+30=16x+24$ $\therefore x = 6$ $\therefore$ Required
Question : X is 30% more than Y and 25% less than Z. If the value of Y is Rs. 300, then what is the value (in Rs.) of Z?
Option 1: 390
Option 2: 400
Option 3: 470
Option 4: 520
Correct Answer: 520
Solution : Value of Y = 300 So, X = $300 × \frac{130}{100}$ = $390$ Now, X = Z × $\frac{75}{100}$ ⇒ 390 = Z × $\frac{75}{100}$ ⇒ Z = $\frac{100}{75}\times 390$ ⇒ Z = 520 Hence, the correct answer is 520.
Question : Directions: Select the option in which the number set shares the same relationship as that shared by the given number set. (101, 106, 131)
Option 1: (29, 34, 39)
Option 2: (123, 128, 153)
Option 3: (170, 202, 137)
Option 4: (419, 424, 437)
Correct Answer: (123, 128, 153)
Solution : Given: (101, 106, 131)
Here, 101 + 5 = 106; 106 + 25 = 131
Let's check the options – First option: (29, 34, 39); 29 + 5 = 34; 34 + 25 = 59 ≠ 39 Second option: (123, 128, 153); 123
Question : Which level of the food chain includes Typha bulrushes, Sagittaria, Hydrilla, Rupia, and Chara, occurring in concentric layers from the periphery to the deep regions?
Option 1: Producers
Option 2: Primary consumers
Option 3: Secondary consumers
Option 4: Decomposer
Correct Answer: Producers
Solution : The correct option is Producers.
In freshwater ecosystems, primary producers like Typha bulrushes, Sagittaria, Hydrilla, Rupia, and Chara use photosynthesis to convert sunlight into energy. This energy serves as the foundation of the food chain and is consumed by higher trophic levels, such as
Question : Directions: A paper is folded and cut as shown below. How will it appear when unfolded?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : When the given folded paper is unfolded, it will look like –
Hence, the second option is correct.
Question : Directions: Two statements are given, followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: Some rivers are oceans. All oceans are beaches. Conclusions: I. Some rivers are beaches. II. All oceans are rivers.
Option 1: Only conclusion II follows
Option 2: Both conclusions I and II follow
Option 3: Neither conclusion I nor II follows
Option 4: Only conclusion I follows
Correct Answer: Only conclusion I follows
Solution : The possible Venn diagram according to the given statements is as follows –
Let's analyse the conclusions – Conclusion (I): Some rivers are beaches – From the given Venn diagram, it is evident that the circles representing rivers and beaches overlap and
Question : Directions: Six people are sitting in two parallel rows with 3 people each in such a way that there is equal distance between adjacent persons. S, T, and U are seated in the same row facing south. X, Y, and Z are seated in the same row facing north. U sits at the extreme right end of their row and is exactly opposite X. T is the immediate neighbour of U and sits exactly opposite Z. Who sits at the extreme right end of the row facing North?
Option 1: Z
Option 2: Y
Option 3: U
Option 4: X
Correct Answer: Y
Solution : Given: 1. S, T, and U are seated in the same row facing south. X, Y, and Z are seated in the same row facing north. 2. U sits at the extreme right end of their row and is exactly opposite X. T is the
Question : Directions: A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two matrices, given below. The columns and rows of Matrix (I) are numbered from 0 to 4 and that of Matrix (II) are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g. C can be represented by 00, 12, 23, etc, and M can be represented by 56, 67, 77, etc. Similarly, you have to Identify the set for the word GOD.
MATRIX I
Matrix II
Option 1: 10, 11, 65
Option 2: 95, 79,12
Option 3: 30, 65, 40
Option 4: 00, 10, 75
Correct Answer: 30, 65, 40
Solution : Given: GOD
Number representations of each letter – G→04, 10, 22, 30, 43 O→58, 65, 76, 86, 99 D→01, 11, 24, 33, 40
First option: 10, 11, 65; O and D cannot be represented as 11 and 65 respectively. Second option: 95, 79,12;
Question : Ayush spends 25% of the amount of money on an insurance policy, 26% on food, 23% on children’s education and 19% on recreation. He deposits the remaining amount of INR 26,600 in the bank. What is the total amount (in INR) that he spends on food and recreation together?
Option 1: 1,95,000
Option 2: 1,71,000
Option 3: 1,62,000
Option 4: 1,83,000
Correct Answer: 1,71,000
Solution : Let the total amount of money Ayush has to be $x$. He spends: 25% on insurance, which is $0.25x$. 26% on food, which is $0.26x$ 23% on children’s education, which is $0.23x$. 19% on recreation, which is $0.19x$. The total percentage spent = 25% +
Question : Directions: A paper is folded and cut as shown. How will it appear when unfolded?
Hence, the fourth option is correct.
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