Staff Selection Commission Sub Inspector Exam
Question : The length of the common chord of two intersecting circles is 24 cm. If the diameter of the circles are 30 cm and 26 cm, then the distance between the centres (in cm) is:
Option 1: 16 cm
Option 2: 14 cm
Option 3: 18 cm
Option 4: 12 cm
Correct Answer: 14 cm
Solution : The length of the common chord = 24 cm Diameter of the 1st circles = 30 cm Radius of 1st circle = 15 cm Diameter of 2nd circle = 26 cm Radius of 2nd circle = 13 cm The line joining the centres bisects
Question : What is a brine solution?
Option 1: Excess salt + water
Option 2: Silver
Option 3: Excess ethanol + water
Option 4: Excess starch + water
Correct Answer: Excess salt + water
Solution : The correct option is Excess salt + water.
A brine solution is a mixture of water and excess salt, most commonly sodium chloride (NaCl). It is commonly used for a variety of purposes, including food preservation (such as pickling), flavouring and
Question : Directions: If + means –, – means ×, × means ÷, and ÷ means +, then what will come in place of (?) in the given equation? 30 + 5 – 2 × 10 ÷ 2 = ?
Option 1: 50
Option 2: 31
Option 3: 80
Option 4: 60
Correct Answer: 31
Solution : Given: + means –, – means ×, × means ÷, and ÷ means + 30 + 5 – 2 × 10 ÷ 2 = ?
After interchanging the given mathematical signs, we get – ⇒ 30 – 5 × 2 ÷ 10 + 2 ⇒
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
Option 1: 60
Option 2: 50
Option 3: 55
Option 4: 75
Correct Answer: 55
Solution : Given:
The pattern can be observed running vertically down the columns. Column 1: (9)2 – (6)2 = 81 – 36 = 45 Column 3: (12)2 – (8)2 = 144 – 64 =
Question : Directions: In this question, a sentence is given with a blank to be filled in with an appropriate word. Four alternatives are suggested for each question. Choose the correct alternative out of the four alternatives.
There are no solitary, free-living creatures; every form of life is ___ other forms.
Option 1: dependent on
Option 2: parallel to
Option 3: overshadowed by
Option 4: segregated from
Correct Answer: dependent on
Solution : The correct answer is the first option.
This sentence suggests that all forms of life rely on or are interconnected with other forms of life, indicating a state of dependency.
The meanings of the other options are as follows:
Segregated from: It refers
Question : $2(\sin 1^{\circ}× \sec 89^{\circ} ) + 3 (\cos 11^{\circ} × \operatorname{cosec} 79^{\circ}) + 5 (\tan 21^{\circ} × \tan 69^{\circ})$ = ?
Option 1: 11
Option 2: 12
Option 3: 20
Option 4: 10
Correct Answer: 10
Solution : $2(\sin 1^{\circ}× \sec 89^{\circ} ) + 3 (\cos 11^{\circ} × \operatorname{cosec} 79^{\circ}) + 5 (\tan 21^{\circ} × \tan 69^{\circ})$ = $2(\frac{\sin 1^{\circ}}{ \cos 89^{\circ}} ) + 3 (\frac{\cos 11^{\circ}}{ \sin 79^{\circ}}) + 5 (\frac{\tan 21^{\circ} }{\cot 69^{\circ}})$ = $2(\frac{\sin 1^{\circ}}{ \sin(90^{\circ}- 89^{\circ})} ) + 3
Question : What is the structure of Panchayat Raj?
Option 1: Zila Parishad→Block Panchayat→Gram Panchayat→Gram Sabha
Option 2: Khap Panchayat→Zila Panchayat→Block Panchayat→Gram Panchayat→Gram Sabha
Option 3: Khap Panchayat→Zila Panchayat→Block Panchayat→Gram Panchayat
Option 4: Nagar Panchayat→Zila Panchayat→Block Panchayat→Gram Panchayat→Gram Sabha
Correct Answer: Zila Parishad→Block Panchayat→Gram Panchayat→Gram Sabha
Solution : The correct option is Zila Parishad→Block Panchayat→Gram Panchayat→Gram Sabha.
Panchayati Raj is an Indian system of local self-government that seeks to decentralise administrative and financial authority to rural regions. The provisions for the Panchayat Raj system are outlined in Article 243
Question : The total number of males and females in a town is 70,000. If the number of males is increased by 6% and that of females is increased by 4%, then the total number of males and females in the town would become 73,520. What is the difference between the number of males and females in the town, in the beginning?
Option 1: 1,500
Option 2: 1,800
Option 3: 2,000
Option 4: 1,400
Correct Answer: 2,000
Solution : Given: The total number of males and females in a town is 70,000. The number of males is increased by 6% and that of females is increased by 4%, the total number of males and females in the town would become 73,520. Let $x$ be
Question : Directions: In a certain code language, GOA is written as 7151 and DOG is written as 4157. How will MAN be written in that language?
Option 1: 13114
Option 2: 31114
Option 3: 12113
Option 4: 11113
Correct Answer: 13114
Solution : Given: GOA is written as 7151 and DOG is written as 4157.
Write the place value of each letter of GOA, to obtain the required code – G→7; O→15; A→1 Thus, GOA is coded as 7151. And, DOG is written as 4157. D→4; O→15; G→7
Question : What is the valency of Boron?
Option 1: 2
Option 2: 3
Option 3: 4
Option 4: 1
Correct Answer: 3
Solution : The correct option is 3
Boron, being an element with atomic number 5, has three valence electrons. It often forms three covalent bonds in compounds. The valency of boron in many of its compounds is thus considered to be 3.
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