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Q:

Which was true of Pullman porters in the 1920s?

A) The porters could not start a union because it was illegal.	B) The porters needed a union because they were not treated well.
C) The porters did not need a union because they made good money.	D) The porters could not start a union because they were African American.

Answer & Explanation Answer: B) The porters needed a union because they were not treated well.

Explanation:

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Filed Under: World History
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Q:

The 45th World Skills Competition 2019 will take place in which of the following country?

A) India	B) Russia
C) Finland	D) South Korea

Answer & Explanation Answer: B) Russia

Explanation:

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Filed Under: Sports
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Q:

$a^{2} + b^{2} + c^{2} - ab - bc - ca = 0, iff$

A) abc = -1	B) a = b = c
C) abc = 1	D) abc = 0

Answer & Explanation Answer: B) a = b = c

Explanation:

Here given formula is

$a^{2} + b^{2} + c^{2} - ab - bc - ca = 0$

and it is possible if and only if a = b = c.

From the trial and error method,

1) Let a = b = c = 1

Now substitute these values of a, b, c in the above formula.

We get 1 + 1 + 1 - 1 - 1 - 1 = 3 - 3 = 0

2) Now, let a = b = c = 4

Now substitute these values of a, b, c in the above formula.

We get 16 + 16 + 16 - 16 - 16 - 16 = 48 - 48 = 0.

Hence, it is possible that

$a^{2} + b^{2} + c^{2} - ab - bc - ca = 0 iff a = b = c.$

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Filed Under: Arithmetical Reasoning
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Q:

Find the next number in the given number sequence?

9, 19, 21, 43, 45, ...

A) 88	B) 54
C) 91	D) 49

Answer & Explanation Answer: C) 91

Explanation:

The given number series 9, 19, 21, 43, 45, ... follows a pattern that

ALternately (x 2 + 1) and (x 1 + 2)

9

9 x 2 + 1 = 19

19 x 1 + 2 = 21

21 x 2 + 1 = 43

43 x 1 + 2 = 45

45 x 2 + 1 = 91

Hence, the next number in the given sequence is 91.

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Filed Under: Number Series
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Q:

During the 1950's American consumers

A) emphasized the importance of nurturing children	B) purchased new labor saving appliances
C) became a symbol of youth culture	D) All of the above

Answer & Explanation Answer: B) purchased new labor saving appliances

Explanation:

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Filed Under: World History
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Q:

Oxidation number of $S_{8}$ ?

A) +1	B) -2
C) +2	D) 0

Answer & Explanation Answer: D) 0

Explanation:

$S_{8}$ is an elemental form of sufur. In elemental form it can't be reduced or oxidized. Hence, it oxidation number is zero and thus sulfur is zerovalent here.

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Filed Under: Chemistry
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Q:

Process occurs in cytoplasm

A) Glycolysis	B) Cell division
C) Both A & B	D) None of the above

Answer & Explanation Answer: C) Both A & B

Explanation:

Most cellular activities will occur in the cytoplasm of the cell. Many metabolic pathways including glycolysis and process such as cell division occurs in the cytoplasm of the cell.

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Filed Under: Biology
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Q:

In 1941, who commanded U.S troops in Europe?

A) Harold R. Stark	B) General Dwight D. Eisenhower
C) Hoyt. S	D) None of the above

Answer & Explanation Answer: B) General Dwight D. Eisenhower

Explanation:

dwight-d-eisenhower1538053135.jpg image

General Dwight D. Eisenhower commanded U.S troops in Europe in 1942.

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Filed Under: World History
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