Staff Selection Commission Combined Higher Secondary Level Exam
Question : If $(y-\frac{1}{y})=-9$, what will be the value of $(y^5-\frac{1}{y^5})?$
Option 1: – 62757
Option 2: – 62748
Option 3: – 62739
Option 4: – 59049
Correct Answer: – 62739
Solution : $(y-\frac{1}{y})=-9$ Squaring on both sides, ⇒ $(y-\frac{1}{y})^2=(-9)^2$ ⇒ $y^2+\frac{1}{y^2}-2×y×\frac{1}{y}=(-9)^2$ ⇒ $y^2+\frac{1}{y^2}= 81+2= 83$ Squaring on both sides, $(y^2+\frac{1}{y^2})^2$ = $83^2$ ⇒ $y^4+\frac{1}{y^4}+2 = 6889$ ⇒ $y^4+\frac{1}{y^4} = 6887$ ⇒ $(y-\frac{1}{y})(y^4+\frac{1}{y^4})$ = $(y^5-\frac{1}{y^5}-y^3+\frac{1}{y^3})$ ⇒ $-9×6887 = (y^5-\frac{1}{y^5}-(y^3-\frac{1}{y^3}))$ ⇒ $-9×6887 = [y^5-\frac{1}{y^5}-(y-\frac{1}{y})(y^2+\frac{1}{y^2}+y×\frac{1}{y})]$ ⇒ $-61983 = [y^5-\frac{1}{y^5}-(-9)(83+1)]$
Question : Select the most appropriate meaning of the given idiom. On the straight and narrow
Option 1: The unrefined and complicated
Option 2: The straightforward and ethically acceptable
Option 3: The honest but dubious
Option 4: The unpredictable though genuine
Correct Answer: The straightforward and ethically acceptable
Solution : The correct meaning of the idiom "on the straight and narrow" is the second option.
The straightforward and ethically acceptable: This is the correct meaning of the idiom. It indicates that someone is living an honest and morally upright life, following
Question : A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct?
Option 1: Both spheres will reach the ground simultaneously.
Option 2: A will reach the ground first.
Option 3: B will reach the ground first.
Option 4: The question is incomplete because the masses of the spheres are not given.
Correct Answer: Both spheres will reach the ground simultaneously.
Solution : The correct option is B will reach the ground first.
Regardless of their masses, all objects close to the surface of the Earth will accelerate owing to gravity at the same pace. The Earth's surface is moving at
Question : Directions: The bar graph shows the marks obtained by a student in an examination out of 100 marks in each subject. Study the graph and answer the questions.
The ratio of the marks in maths and History is:
Option 1: 6 : 5
Option 2: 8 : 5
Option 3: 3 : 4
Option 4: 4 : 3
Correct Answer: 4 : 3
Solution : As seen from the bar graph, Marks obtained in Maths = 80 Marks obtained in History = 60 The ratio of marks obtained in Maths to that of History = 80 : 60 = 4 : 3 Hence, the correct answer is 4
Question : Directions: Identify the figure given in the options which when put in place of the question mark (?) will logically complete the series.
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : According to the given figure – The triangles flip their position from upside to downside or vice versa, one at a time, starting from the bottom triangle. So, in the second box, the bottom triangle will change its position but the upper triangle will remain the
Question : Select the most appropriate synonym of the given word. Feasibility
Option 1: Sustainability
Option 2: Impropriety
Option 3: Heavy
Option 4: Probability
Correct Answer: Probability
Solution : The fourth option is the correct choice.
The most appropriate synonym for "feasibility" is "probability", because both terms are associated with the likelihood or chance of something happening. Feasibility refers to the practicality or possibility of a proposed plan, while probability
Question : Let ABC be an equilateral triangle and AD perpendicular to BC, Then AB2 + BC2 + CA2 =?
Option 1: 2AD2
Option 2: 3AD2
Option 3: 4AD2
Option 4: 5AD2
Correct Answer: 4AD2
Solution : Here ABC is an equilateral triangle with side length $a$ and AD $\perp$ BC. So, BD = CD = $\frac{a}{2}$ In $\triangle$ABD, AB2 = BD2 + AD2 ⇒ $a^2=(\frac{a}{2})^2+$ AD2 $\therefore$ AD = $\frac{\sqrt3}{2}a$ = $\frac{\sqrt3}{2}$AB = $\frac{\sqrt3}{2}$BC = $\frac{\sqrt3}{2}$AC
Question : The measure of each interior angle of a regular polygon with 8 sides is:
Option 1: $135^{\circ}$
Option 2: $120^{\circ}$
Option 3: $100^{\circ}$
Option 4: $45^{\circ}$
Correct Answer: $135^{\circ}$
Solution : Number of sides, $n$ = 8 Each interior angle of an octagon = $(\frac{2n-4}{n})×90^{\circ}$ = $(\frac{2×8-4}{8})×90^{\circ}$ = $(\frac{16-4}{8})×90^{\circ}$ = $\frac{12}{8}×90^{\circ}$ = $3 × 45^{\circ}$ = $135^{\circ}$ Hence, the correct answer is $135^{\circ}$.
Question : Select the correct indirect form of the given sentence. Tina said, "My parents are getting divorced."
Option 1: Tina said that her parents are getting divorced.
Option 2: Tina said that her parents were get divorced.
Option 3: Tina said that her parents have been getting divorce.
Option 4: Tina said that her parents were getting divorced.
Correct Answer: Tina said that her parents were getting divorced.
Solution : The correct choice is the fourth option.
The steps of conversion are as follows:
Question : Which one of the following is the most lasting contribution of the Rashtrakutas?
Option 1: Kailasha Temple
Option 2: Pampa, Ponna, and Ranna, the three writers of Kannada poetry, and Kailasha Temple
Option 3: Patronage of Jainism
Option 4: Conquests
Correct Answer: Pampa, Ponna, and Ranna, the three writers of Kannada poetry, and Kailasha Temple
Solution : The correct option is Pampa, Ponna, and Ranna, the three writers of Kannada poetry and Kailasha Temple.
The Kailasa temple at Ellora is a massive rock-cut Shiva temple. It is one of
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