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Q:

The number of oranges in three baskets are in the ratio of 3 : 4 : 5. In which ratio the no. of oranges in first two baskets must be increased so that the new ratio becomes 5 : 4 : 3?

A) 1:3	B) 2:1
C) 3:4	D) 2:3

Answer & Explanation Answer: B) 2:1

Explanation:

Let, B1 : B2 : B3 = 3x : 4x : 5x

again B1 : B2 : B3 = 5y : 4y : 3y

Since there is increase in no.of oranges in first two baskets only, it means the no. of oranges remains constant in the third basket

Therefore, 5x = 3y

Hence 3x : 4x : 5x => $\frac{9 y}{5} : \frac{12 y}{5} : \frac{15 y}{5}$ = 9y:12y:15y

and 5y : 4y : 3y => 25x : 20x : 15x

Therfore, increment in first basket = 16

Increment in second basket = 8

Thus, required ratio = 16/8 = 2:1

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Filed Under: Ratios and Proportions

Q:

A, B and C have amounts in the ratio of 3 : 4 : 5. First B gives 1/4th to A and 1/4th to C then C gives 1/6th to A. Find the final ratio of amount of A, B and C respectively.

A) 4:3:5	B) 5:4:3
C) 3:4:5	D) 5:2:5

Answer & Explanation Answer: D) 5:2:5

Explanation:

A B C

3x 4x 5x

(3x+x) 2x (5x+x) (B Gives 1/4 to A and 1/4 to C)

=4x 2x 6x

(4x+x) 2x 5x ( C Gives 1/6 to A)

=5x 2x 5x

Therefore, 5 : 2 : 5

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Filed Under: Ratios and Proportions

Q:

First China War was fought between

A) China and Britain	B) China and France
C) China and Egypt	D) China and Greek

Answer & Explanation Answer: A) China and Britain

Explanation:

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Filed Under: General Awareness

Q:

Who had an explosive idea and first patented DYNAMITE?

A) J. R. Gluber	B) A. Nobel
C) G. Fawks	D) W. Bickford

Answer & Explanation Answer: B) A. Nobel

Explanation:

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Filed Under: Inventions

Q:

Who is often called the 'first African-American' inventor?

A) Bessie Blount	B) George Washington Carver
C) Benjamin Banneker	D) Elijah McCoy

Answer & Explanation Answer: C) Benjamin Banneker

Explanation:

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Filed Under: Inventions

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

Explanation:

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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

Explanation:

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Filed Under: Inventions

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