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Q:

Who Invented The World Wide Web ?

A) Sir Timothy John	B) Earle Dickson
C) James Rineose	D) Laszlo Jozsef Biro

Answer & Explanation Answer: A) Sir Timothy John

Explanation:

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Filed Under: Inventions

Q:

Lift was invented by

A) Otis	B) Domagk
C) Lee De Forest	D) None of these

Answer & Explanation Answer: A) Otis

Explanation:

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Filed Under: Inventions

Q:

Typewriter was invented by

A) Shockley	B) Sholes
C) Howe	D) None of these

Answer & Explanation Answer: B) Sholes

Explanation:

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Filed Under: Inventions

Q:

Air conditioner was discovered by

A) Edison	B) Wilson
C) Carrier	D) Roentgen

Answer & Explanation Answer: C) Carrier

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

Q:

54.327 x 357.2 x 0.0057 is same as

A) 5.4327 x 3.572 x5.7	B) 5.4327 x 3.572 x0.57
C) 54327 x 3572 x 0.0000057	D) None of these

Answer & Explanation Answer: A) 5.4327 x 3.572 x5.7

Explanation:

Number of decimal places in the given expression = 8

Number of decimal places in (A) = 8

Number of decimal places in (B) = 9

Number of decimal places in (C)= 7

Clearly , the expresssion in (A) is the same as the given Expression.

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Filed Under: Decimal Fractions

Q:

When 0.232323.... is converted into a fraction , then the result is

A) 1/5	B) 2/9
C) 23/99	D) 23/100

Answer & Explanation Answer: C) 23/99

Explanation:

$0.232323 . . . = 0.23 = \frac{23}{99}$

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Filed Under: Decimal Fractions

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