Staff Selection Commission Sub Inspector Exam
Question : Ramu had to select a list of numbers between 1 and 1000 (including both), which are divisible by both 2 and 7. How many such numbers are there?
Option 1: 142
Option 2: 71
Option 3: 97
Option 4: 642
Correct Answer: 71
Solution : The numbers that are divisible by both 2 and 7 = 2 × 7 = 14 The smallest number divisible by 14 = 14 The largest number divisible by 14 = 994 (nearest to 1000) Let the required number be $n$. Now, $a_n=a+(n-1)d$, where $a_n$
Question : What is the LCM of 0.15, 0.18, and 0.45?
Option 1: 0.9
Option 2: 0.09
Option 3: 0.81
Option 4: 0.6
Correct Answer: 0.9
Solution : $0.15 = \frac{15}{100}$ $0.18 =\frac{18}{100}$ $0.45 =\frac{45}{100}$ We know, LCM of fractions = $\frac{\text{LCM of numerators}}{\text{HCF of denominators}}$ So, LCM of $ \frac{15}{100}, \frac{18}{100}$, and $\frac{45}{100}=\frac{90}{100}=0.9$ Hence the correct answer is 0.9.
Question : Select the most appropriate meaning of the given idiom.
All ears.
Option 1: To scold someone bitterly.
Option 2: To listening attentively.
Option 3: To listen to everyone.
Option 4: To not be vocal.
Correct Answer: To listening attentively.
Solution : The correct choice is the second option.
Explanation:
The idiom all ears is commonly used to convey the idea of someone being fully attentive and eager to listen. It doesn't have a literal meaning but rather a figurative one, suggesting that someone
Question : World Trade Organization (WTO) was started in the year:
Option 1: 1984
Option 2: 1994
Option 3: 1995
Option 4: 1996
Correct Answer: 1995
Solution : The correct option is 1995.
The World Trade Organisation began operations on January 1st, 1995. It is in charge of regulating global trade and helps its 164 members negotiate trade deals. The organization also functions as a forum for resolving trade disputes between nations,
Question : The value of $\frac{4.669 \times 4.669–9 \times(0.777)^2}{(4.669)^2+(2.331)^2+14(0.667)(2.331)}$ is $(1-k)$, where $k = $?
Option 1: 0.666
Option 2: 0.647
Option 3: 0.467
Option 4: 0.768
Correct Answer: 0.666
Solution : Given: The expression is $\frac{4.669 \times 4.669–9 \times(0.777)^2}{(4.669)^2+(2.331)^2+14(0.667)(2.331)}=(1 - k)$ Use the algebraic identities, $(a+b)^2=a^2+b^2+2ab$ and $a^2-b^2=(a+b)(a-b)$ ⇒ $\frac{4669 \times 4669–9 \times(777)^2}{(4669)^2+(2331)^2+14(0667)(2331)}=(1 - k)$ ⇒ $\frac{(4669)^2–(2331)^2}{(4669)^2+(2331)^2+2(4669)(2331)}=(1 - k)$ ⇒ $\frac{(4669)^2–(2331)^2}{(4669+2331)^2}=(1 - k)$ ⇒ $\frac{(4669–2331)(4669+2331)}{(4669+2331)^2}=(1 - k)$ ⇒ $\frac{(4669–2331)}{(4669+2331)}=(1 - k)$ ⇒ $\frac{2338}{7000}=(1 - k)$ ⇒
Question : If $\cos A + \cos B + \cos C = 3$, then what is the value of $\sin A + \sin B + \sin C$?
Option 1: $1$
Option 2: $2$
Option 3: $0$
Option 4: $-1$
Correct Answer: $0$
Solution : The equation $\cos A + \cos B + \cos C = 3$ holds when $A = B = C = 0°$ because the maximum value of $\cos \theta$ is $1$. Since $\sin 0° = 0$, the value of $\sin A + \sin B + \sin
Question : Directions: Select the Venn diagram that best illustrates the relationship between the following classes. Europe, United Kingdom, London
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : London is the capital of the United Kingdom and is a country in Northwestern Europe. Therefore, the circle of London lies inside the circle of the United Kingdom and the circle of the United Kingdom lies inside the circle of Europe. The Venn diagram is as
Question : Study the following table and answer the question. Percentage of marks obtained by five students in different subjects.
What are the average marks in percentage obtained by Mohan?
Option 1: 70.6%
Option 2: 74.6%
Option 3: 73.2%
Option 4: 73.6%
Correct Answer: 73.6%
Solution : Mohan's marks in Chemistry = 300 × $\frac{70}{100}$ = 210 Mohan's marks in Mathematics = 300 × $\frac{75}{100}$ = 225 Mohan's marks in Physics = 150 × $\frac{80}{100}$ = 120 Mohan's marks in Hindi = 300 × $\frac{65}{100}$ = 195 Mohan's marks in English =
Question : Directions: Select the figure from among the given options that can replace the question mark (?) in the following series.
Solution : According to the given figures – 1. The elements inside the box are interchanging their positions with the opposite elements. 2. The elements on the right side and the bottom of the box are interchanged alternately with the new elements. The required figure is as follows
Question : Directions: Z @ A means Z is the son of A. Z * A means Z is the brother of A. Z × A means Z is the father of A. Z # A means Z is the sister of A. Z + A means Z is the daughter of A. Z = A means Z is the mother of A. How is A related to Y in the following expression? A * S = J @ M × Y
Option 1: A is the father of Y
Option 2: A is the brother of Y
Option 3: A is the brother of Y’s mother
Option 4: A is the cousin of Y
Correct Answer: A is the brother of Y’s mother
Solution : Given: Z @ A⇒Z is the son of A. Z * A⇒Z is the brother of A. Z × A⇒Z is the father of A. Z # A⇒Z is the sister of A. Z + A ⇒Z is the
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