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Question : When did Carl Friedrich Gauss and Wilhelm Eduard Weber invent the world's first electromagnetic telegraph?
Option 1: 1833
Option 2: 1832
Option 3: 1830
Option 4: 1831
Correct Answer: 1833
Solution : The correct answer is 1833.
Carl Friedrich Gauss and Wilhelm Eduard Weber invented the first electromagnetic telegraph in 1833. Weber was appointed physics professor in Gottingen in 1831, having completed his studies in Halle and Gottingen. His attempts to create an absolute electrical unit
Question : Directions: Which of the following letter clusters will replace the question mark (?) in the given series? OD, LA, IX, FU, ?
Option 1: BR
Option 2: CS
Option 3: CR
Option 4: CT
Correct Answer: CR
Solution : Given: OD, LA, IX, FU,?
Subtract 3 from the place value of the first and second letter, to get the required missing term in the series – OD→O – 3 = L; D – 3 = A→LA LA→L – 3 = I; A – 3
Question : The number system 'Zero' was invented by
Option 1: Ramanujam
Option 2: Arybhatta
Option 3: Patanjali
Option 4: An unknown person
Correct Answer: Arybhatta
Solution : Correct Answer is Aryabhatta
The concept of zero was transmitted from India and Babylon to Greece, Persia, and the Arab world over the course of hundreds of years. Zero was first used in calculations by Aryabhatta in the fifth century and Brahmagupta sometime around 628
Question : Directions: In the following question, some parts of the sentence have errors, and some are correct. Find out which part of the sentence has an error. The number of that part is the answer. If a sentence is error-free, your answer is "No Error."
The government (1) / must provide facilities for the (2) / upbringing of women. (3) / No Error (4)
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (3)
Solution : The error lies in the third part of the sentence.
The term "upbringing" typically refers to the process of raising and nurturing children, not fully grown women. Thus, it should be "upbringing of a girl child" in the sentence.
Therefore, the correct sentence is "The
Question : Which is the highest peak of the Aravalli Mountain Range?
Option 1: Saltoro Kangri
Option 2: Chaukhamba
Option 3: Kamet
Option 4: Guru Shikhar
Correct Answer: Guru Shikhar
Solution : The correct option is Guru Shikhar.
Guru Shikhar is the highest summit in the Aravalli Mountain Range. In the Sirohi area of Rajasthan, India, Guru Shikhar is situated close to Mount Abu. It is the highest peak in the state of Rajasthan as well
Question : Select the most appropriate meaning of the given idiom. To hit the nail on the head
Option 1: To hit something accurately
Option 2: To be indecisive
Option 3: To miss an opportunity
Option 4: To express an idea with great precision
Correct Answer: To express an idea with great precision
Solution : The correct choice is the fourth option.
Explanation: The idiom "to hit the nail on the head" means expressing an idea with great precision or accurately addressing the main issue. It is used to describe someone who gets to
Question : Select the word with the correct spelling from the options given below to fill in the blank.
They saw the beautiful _______ of the Gods in the Temples.
Option 1: idols
Option 2: idoles
Option 3: ideals
Option 4: idles
Correct Answer: idols
Solution : The correct choice is the first option.
Idols: Objects of adoration or worship, often referring to religious or celebrity figures.
The meanings of the other options are as follows:
Question : Choose the word that can substitute the given group of words. One who is 100 years old or older
Option 1: Centenarian
Option 2: Immortal
Option 3: Mortal
Option 4: Sententia
Correct Answer: Centenarian
Solution : The first option is correct.
Centenarian means a person who is 100 years old or older. It is a noun and can be used to describe someone who has reached the age of 100 or more.
Therefore, the correct answer is centenarian.
Question : If the sum of all interior angles of a regular polygon is 14 right angles, then its number of sides is:
Option 1: 8
Option 2: 9
Option 3: 7
Option 4: 6
Correct Answer: 9
Solution : Sum of all interior angles = $14×90^{\circ}$ = $1260^{\circ}$ Let the number of sides of the polygon be $n$. ⇒ $1260^{\circ}$ = $(n-2)×180^{\circ}$ ⇒ $(n-2)$ = $\frac{1260}{180}$ ⇒ $(n-2)$ = $7$ ⇒ $n$ = $2+7$ = $9$ Hence, the correct answer is 9.
Question : If $\cos \theta-\sin \theta=\sqrt{2} \sin \theta$, then $(\cos \theta+\sin \theta)$ is:
Option 1: $-\sqrt{2} \cos \theta$
Option 2: $\sqrt{2} \cos \theta$
Option 3: $\sqrt{2} \tan \theta$
Option 4: $-\sqrt{2} \sin \theta$
Correct Answer: $\sqrt{2} \cos \theta$
Solution : According to the question, ⇒ $\cos \theta-\sin \theta=\sqrt{2} \sin \theta$ ⇒ $(\cos\theta + \sin\theta)^{2} = 2 \sin^{2}\theta$ ⇒ $\cos^{2}\theta + \sin^{2}\theta + 2\sin\theta\cos~\theta = 2\sin^{2}\theta$ ⇒ $\sin^{2}\theta - \cos^{2}\theta - 2\sin~\theta~cos\theta = 0$ ⇒ $\sin^{2}\theta + \cos^{2}\theta - 2\sin\theta\cos\theta = 2 \cos^{2}\theta$ ⇒
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