Exams Questions and Answers

Q:

Sumanth walks 200 feet straight from his house, which is facing north and then he walks 100 feet in reverse direction.Further he takes a left turn and walks 300 yards.In Which direction is Sumanth now from his original position?

A) South-East	B) North-East
C) South-West	D) North-West

Answer & Explanation Answer: B) North-East

Explanation:

Starting From his house, Sumanth walks 200 feet straight towards North; we can write it as $N_{200}$ . Similarly, the other distances and directions can be considered and written as follows : (Notice that he covers 300 yards towards East; one yard = 3 feet and hence 300 yards = 900 feet)

$N_{200} S_{100} E_{900}$ Adding all south and all North distances and finding the net result, and also adding all East and all West distances and finding the net result, this can further be summarized as : $N_{100} E_{900}$

Thus, the direction from his original position is North-East.

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Filed Under: Direction Sense Test
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Q:

For how many positive integers 'n', $n^{3} - 8 n^{2} + 20 n - 13$ is a prime?

A) 3	B) 2
C) 5	D) 7

Answer & Explanation Answer: A) 3

Explanation:

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Filed Under: Simplification
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Q:

Find the unit digit of the expression

$31^{2} + 32^{2} + 33^{2} + 34^{2} + 35^{2} + 36^{2} + 37^{2} + 38^{2} + 39^{2}$

A) 1	B) 4
C) 5	D) 9

Answer & Explanation Answer: C) 5

Explanation:

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Filed Under: Simplification
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Q:

Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?

A) Addition reaction	B) Substition reaction
C) Combustion reaction	D) Decomposition reaction

Answer & Explanation Answer: C) Combustion reaction

Explanation:

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Filed Under: Chemistry
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Q:

Find the volume (in cub.cm) of a hemisphere of diameter 28 cm.

A) 4789.67	B) 3675
C) 2732	D) 5749.33

Answer & Explanation Answer: D) 5749.33

Explanation:

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Filed Under: Volume and Surface Area
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Q:

Which media have the ability to have data/information stored (written) on them by users more than once?

A) CD-R disks	B) CD-RW disks
C) Zip disks	D) Optical disks

Answer & Explanation Answer: B) CD-RW disks

Explanation:

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Filed Under: Computer
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Q:

The most reactive of the following metals is

A) Al	B) Ca
C) Ni	D) Pb

Answer & Explanation Answer: B) Ca

Explanation:

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Filed Under: Chemistry
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Q:

Country : President :: State : ?

A) Governor	B) Speaker
C) Prime Minister	D) Chief Minister

Answer & Explanation Answer: A) Governor

Explanation:

The President is the highest officer in the country. Similarly, Governor is the highest officer of the state.

Hence, Country : President :: State : Governor.

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Filed Under: Analogy
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