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Q:

Where were wigs first invented?

A) Japan B) France
C) Egypt D) China
 
Answer & Explanation Answer: C) Egypt

Explanation:
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Filed Under: Inventions

Q:

Who was the first person to patent the JET ENGINE?

A) F. Whittle B) C. Lindbergh
C) W. Histell D) B. Owings
 
Answer & Explanation Answer: A) F. Whittle

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Filed Under: Inventions

Q:

Which scientist discovered the radioactive element radium?

A) Isaac Newton B) Marie Curie
C) Benjamin Franklin D) None of these
 
Answer & Explanation Answer: B) Marie Curie

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Filed Under: Inventions

Q:

What George Westinghouse invented?

A) Electric razor B) Light bulb
C) Railway air brakes D) Refrigerator
 
Answer & Explanation Answer: C) Railway air brakes

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Filed Under: Inventions

Q:

In which decade was the Internet first implemented?

A) 1940s B) 1960s
C) 1970s D) 1980s
 
Answer & Explanation Answer: B) 1960s

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Filed Under: Inventions

Q:

The price of commodity X increases by 40 paise every year, while the price of commodity Y increases  by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity?

A) 2010 B) 2011
C) 2012 D) 2013
 
Answer & Explanation Answer: B) 2011

Explanation:

Suppose commodity X wil cost 40 paise more than Y after Z  years. Then,

        (4.20 + 0.40Z) - (6.30 + 0.15Z) = 0.40

=>  0.25Z = 0.40 + 2.10  => Z= 2.50/0.25 = 10

Therefore, X will cost 40 paise more than Y 10  years after 2001 . i.e in 2011

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Filed Under: Decimal Fractions

Q:

What is the difference between the biggest and the smallest fraction among 2/3 , 3/4 , 4/5 and 5/6?

A) 1/6 B) 1/12
C) 1/20 D) 1/30
 
Answer & Explanation Answer: A) 1/6

Explanation:

Converting each of the given fractions into decimal form, we get

2/3 = 0.66, 3/4 = 0.75, 4/5 = 0.8, 5/6 = 0.833 

Since 0.833>0.8>0.75>0.66 

So, 5/6 > 4/5 > 3/4 > 2/3 

Therefore,  Required Difference = 5/6 - 2/3 = 1/6

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Filed Under: Decimal Fractions

Q:

The fastest moving land snake in the world is the

Answer

Black Mamba

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Subject: Animals and Birds