Exams


Q:

Who invented Dynamite?

A) Graham Bell B) Nikola Tesla
C) Alfred Nobel D) Louis Pateur
 
Answer & Explanation Answer: C) Alfred Nobel

Explanation:

Alfred Bernhard Nobel was a Swedish chemist, engineer, inventor, businessman, and philanthropist. Known for inventing Dynamite, Nobel also owned Bofors, which he had redirected from its previous role as primarily an iron and steel producer to a major manufacturer of cannon and other armaments.

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Filed Under: Inventions
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Q:

What does this symbol mean '&'?

A) Caret B) Bar
C) Ampersand D) Reversed Caret
 
Answer & Explanation Answer: C) Ampersand

Explanation:

'&' is a Logical Symbol and is called as Ampersand.

 

^ is called Caret

- is called Bar

v is called Reversed Caret.

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Filed Under: Analytical Reasoning
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Q:

Which sentence contains an interjection?

A) Hey, where did I park my car! B) Well, that’s a relief.
C) Oh, now I remember where i put my wallet. D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Yes, all the above given sentences have an interjection.

 

1. Hey ! is an interjection in the sentence , Hey!, where did I park my car? 

 

2. Well is an interjection in the sentence, Well!, that's a relief.

 

3. Oh! is an interjection in the sentence , Oh!, now I remember where i put my wallet.

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Filed Under: English
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Q:

Train A, travelling at 84 kmph, overtook train B, traveling in the same direction, in 10 seconds. If train B had been traveling at twice its speed, then train A would have taken 22.5 seconds to overtake it. Find the length of train B, given that it is half the length of train A.

A) 180 m B) 100 m
C) 200 m D) 150 m
 
Answer & Explanation Answer:

Explanation:

Let speed of train B be x m/s And length of train B be y m
Then length of train A is 2y m
Speed of train A = 84 × 5/18 = 210/9 m/s = 70/3 m/s
A.T.Q, (2y+y)/10 = 70/3 − x .............(i)
and (2y+y)/ 22.5 = 70/3 − 2x ................(ii)
solving (i) and (ii), y = 50 m

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Q:

What are the rungs of the DNA ladder made of?

A) phosphates and sugars B) nitrates and sugars
C) nitrates and phosphates D) sugars and hydrates
 
Answer & Explanation Answer: C) nitrates and phosphates

Explanation:

The rungs or the sides of the DNA ladder is made of Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA i.e, A sugar (deoxyribose) and a phosphate.

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Filed Under: Biology
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Q:

9 tens 10 ones equals

A) 910 B) 90
C) 91 D) 100
 
Answer & Explanation Answer: D) 100

Explanation:

9 tens 10 ones equals

=> 9 x 10 + 10 x 1

=> 90 + 10

=> 100.

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Filed Under: Arithmetical Reasoning
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Q:

Break the logic behind the given mathematical puzzle?

Maths_logic_puzzle1557901040.png image

A) 7 B) 8
C) 11 D) 13
 
Answer & Explanation Answer: B) 8

Explanation:

In the given puzzle,

The logic is in the format of lets say, a/b


In that case b doesn't matter, because

2/2 = 1,

6/5 = 6/2 = 3,

10/11 = 10/2 = 5

 

This means that equation is a/2

So 16/19 is equal 16/2 = 8.

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Q:

Karthik incurred a loss of 40 percent on selling an article for Rs. 5,640. At what price should he have sold the item to have profit of 25%?

A) Rs. 11750 B) Rs. 12550
C) Rs. 13650 D) Rs. 11550
 
Answer & Explanation Answer: A) Rs. 11750

Explanation:

From the given data,

The cost price of the article = 5640 x 100/60 = Rs. 9400

The selling price of the article to gain 25% profit = 9400 x 125/100 = Rs. 11750.

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Filed Under: Profit and Loss
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