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Q:

Which of the following has most number of divisors?

A) 99	B) 101
C) 176	D) 182

Answer & Explanation Answer: C) 176

Explanation:

99 = 1 x 3 x 3 x 11

101= 1 x 101

176= 1 x 2x 2 x 2 x 2 x 11

182= 1 x 2 x 7 x 13

So, divisors of 99 are 1, 3, 9, 11, 33, 99

divisors of 101 are 1,101

divisors of 176 are 1, 2, 4, 8, 16, 22, 44, 88, 176

divisors of 182 are 1, 2, 7, 13, 14, 26, 91, 182

Hence , 176 hasthe most number of divisors.

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Filed Under: HCF and LCM

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 invented Fountain Pen?

A) Sir Frank Whittle	B) John J. Loud
C) Kirkpatrick Macmillan	D) Lewis E. Waterman

Answer & Explanation Answer: D) Lewis E. Waterman

Explanation:

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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

Explanation:

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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

Explanation:

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Filed Under: Inventions

Q:

Who Invented Modern Frequency Modulation FM Radio ?

A) Peter Durand	B) Percy Shaw
C) Edwin H. Armstrong	D) Leo Hendrik Baekeland

Answer & Explanation Answer: C) Edwin H. Armstrong

Explanation:

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Filed Under: Inventions

Q:

$(0.2 \times 0.2 + 0.01) {(0.1 \times 0.1 + 0.02)}^{- 1}$ is equal to

A) 5/3	B) 9/5
C) 41/4	D) 41/12

Answer & Explanation Answer: A) 5/3

Explanation:

Given expression = $\frac{(0.2 \times 0.2 \times 0.01)}{(0.1 \times 0.1 \times 0.02)} = \frac{0.04 + 0.01}{0.01 + 0.02} = \frac{0.05}{0.03} = \frac{5}{3}$

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Filed Under: Decimal Fractions

Q:

When 52416 is divided by 312, the quotient is 168. what will be the quotient when 52.416 is divided by 0.0168?

A) 3.12	B) 312
C) 3120	D) None of these

Answer & Explanation Answer: C) 3120

Explanation:

Given, $\frac{52416}{312} = 168 \Leftrightarrow \frac{52416}{168} = 312$

Now , $\frac{52.416}{0.0168} = \frac{52416}{16.8} = \frac{52416}{168} \times 10 = 312 \times 10 = 3120$

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Filed Under: Decimal Fractions

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