Staff Selection Commission Sub Inspector Exam
Question : Which among the following gases is also known as ‘Laughing Gas’?
Option 1: Sulphur dioxide
Option 2: Nitrogen oxide
Option 3: Carbon dioxide
Option 4: Carbon monoxide
Correct Answer: Nitrogen oxide
Solution : The correct option is Nitrogen oxide.
Nitrous oxide (N2O) is a colourless, odourless gas with the chemical formula N2O. It is commonly referred to as "Laughing Gas" due to the euphoric and sometimes giggly effects it can produce when
Question : What is the simplified value of $\left(1-\frac{1}{4-\frac{2}{1+\frac{1}{\frac{1}{3}+2}}}\right) \times \frac{15}{16} \div \frac{2}{3}$ of $2 \frac{1}{4}-\frac{3+4}{3^3+4^3}$
Option 1: $\frac{5}{13}$
Option 2: $\frac{4}{13}$
Option 3: $\frac{8}{13}$
Option 4: $\frac{6}{13}$
Correct Answer: $\frac{4}{13}$
Solution : Given: $\left(1-\frac{1}{4-\frac{2}{1+\frac{1}{\frac{1}{3}+2}}}\right) \times \frac{15}{16} \div \frac{2}{3}$ of $2 \frac{1}{4}-\frac{3+4}{3^3+4^3}$ $=(1-\frac{1}{4-\frac{2}{1+\frac{3}{7}}}) \times \frac{15}{16} \div (\frac{2}{3} \times \frac{9}{4})-\frac{3+4}{27+64}$ $=(1-\frac{1}{4-\frac{14}{10}}) \times \frac{15}{16} \div \frac{3}{2} -\frac{7}{91}$ $=(1-\frac{10}{26}) \times \frac{15}{16} \times \frac{2}{3} -\frac{1}{13}$ $=\frac{16}{26} \times \frac{5}{8} -\frac{1}{13}$ $=\frac{10}{26} -\frac{1}{13}$ $=\frac{10-2}{26}$ $=\frac{8}{26}$ $=\frac{4}{13}$ Hence, the correct answer is $\frac{4}{13}$.
Question : $P Q R S$ is a rectangle. $T$ is a point on $P Q$ such that $R T Q$ is an isosceles triangle and $P T=5 \mathrm{QT}$. If the area of triangle RTQ is $12 \sqrt{3}$ sq.cm, then the area of the rectangle PQRS is:
Option 1: $144 \sqrt{3}$ sq.cm
Option 2: $142$ sq. cm
Option 3: $134 \sqrt{3}$ sq. cm
Option 4: $142\sqrt{3}$ sq. cm
Correct Answer: $144 \sqrt{3}$ sq.cm
Solution : Given: $PT = 5QT$ $PT : QT = 5 : 1$ Let the ratio of $PT : QT$ be $5x : x$. ⇒ $PQ = PT + QT$ ⇒ $PQ = 5x + x$ ⇒ $PQ = 6x$ Area of $\triangle RTQ =
Question : DEF is an isosceles triangle such that DE = DF = 60 cm and EF = 96 cm. DG is a median to base EF. What is the length of DG?
Option 1: 22 cm
Option 2: 36 cm
Option 3: 24 cm
Option 4: 32 cm
Correct Answer: 36 cm
Solution : Given: DE = DF = 60 cm, EF = 96 DG median cuts EF into two halves. So, EG = $\frac{96}{2}=48$ cm In $\triangle$DEG, DE2 = DG2 + EG2 ⇒ DG = $\sqrt{60^2-48^2}=\sqrt{1296}=36$ cm Hence, the correct answer is 36 cm.
Question : Directions: In a certain code language, CASTLE is written as IFWWNF and DRIVER is written as JWMYGS. How will FEMALE be written in that language?
Option 1: MKPDOF
Option 2: KKQEMG
Option 3: MJRDNO
Option 4: LJQDNF
Correct Answer: LJQDNF
Solution : Given: CASTLE is written as IFWWNF and DRIVER is written as JWMYGS.
Add natural numbers in decreasing order (starting from 6) to the place value of each letter of CASTLE, to obtain the required code – C + 6 = I; A + 5 =
Question : Directions: The line chart given below represents the runs scored by Kohli and Sharma against 5 teams. Runs scored by Kohli against team S is how much percentage less than the runs scored by Sharma against team S?
Option 1: 70.21
Option 2: 68.33
Option 3: 58.33
Option 4: 41.66
Correct Answer: 58.33
Solution : Runs scored by Kohli against S = 500 Runs scored by Sharma against S = 1200 Difference = 1200 – 500 = 700 So, the required percentage = $\frac{700}{1200}\times100$ = 58.33% Hence, the correct answer is 58.33.
Question : Directions: F & G means F is the mother of G. F # G means F is the father of G. F @ G means F is the husband of G. F % G means F is the daughter of G. If J @ C & B # R, then how is J related to R?
Option 1: Mother's brother
Option 2: Father
Option 3: Father's sister
Option 4: Father's father
Correct Answer: Father's father
Solution : Given: F & G ⇒ F is the mother of G. F # G ⇒ F is the father of G. F @ G ⇒ F is the husband of G. F % G ⇒ F is the daughter of G.
As per the
Question : Directions: In the given question, there are four figures given out of which three are similar in some manner and one is not like the others. Select the figure that is the odd one out.
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : Let's check each option – First option: Here, two lines are attached at the corner of the oval and face opposite directions. Second option: Here, two lines are attached at the corner of the oval and face opposite directions. Third option: Here, two lines are attached
Question : Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No substitution required’. She is taking all kinds of medicine wherever she goes.
Option 1: was taking
Option 2: took
Option 3: No substitution required
Option 4: takes
Correct Answer: takes
Solution : The correct choice is the fourth option.
Explanation: The reason for this choice is that the sentence is in the present tense, describing a habitual or ongoing action. "Takes" is the present tense form that matches with the singular pronoun. As per the simple present
Question : Identify the segment in the sentence which contains a grammatical error. If there is no error, then select the option 'No error'. When he goes on a business trip, he is usually taking his wife.
Option 1: No error
Option 2: he is usually taking his wife
Option 3: on a business trip
Option 4: When he goes
Correct Answer: he is usually taking his wife
Solution : The error lies in the second option.
The error lies in the verb tense. The sentence is describing a habitual action, so the present simple tense should be used. The correct form should be "he usually takes his wife".
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