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Q:

Storage capacity of magnetic disk depends on

A) disk pack in disk surface	B) tracks per inch of surface
C) bits per inch of tracks	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

Magnetic disk is a kind of data storage device. Storage capacity of magnetic disk depends on

1. tracks per inch of surface

2. bits per inch of tracks

3. disk pack in disk surface

It can be shown as ::

magnetic_disc1532069041.jpg image

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Filed Under: Computer
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Q:

Complete the missing Number Puzzle?

Numberpuzzle21532064729.jpg image

A) 40	B) 52
C) 89	D) 96

Answer & Explanation Answer: D) 96

Explanation:

Here in the given number puzzle, the given numbers follows a pattern that

1 + 4 = 5 => 1 x 4 + 1 = 4 + 1 = 5

2 + 5 = 12 => 2 x 5 + 2 = 10 + 2 = 12

3 + 6 = 21 => 3 x 6 + 3 = 18 + 3 = 21

Similarly,

8 + 11 = 96 => 8 x 11 + 8 = 88 + 8 = 96

Hence, the missing number in the given number puzzle is 96.

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Q:

82.5% of 2360?

A) 1960	B) 1954
C) 1947	D) 1931

Answer & Explanation Answer: C) 1947

Explanation:

Given 82.5% of 2360

$\frac{82.5}{100} x 2360 = 0.825 x 2360 = 1947$

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Filed Under: Percentage
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Q:

5 boys and 3 girls can together cultivate a 23 acre field in 4 days and 3 boys and 2 girls together can cultivate a 7 acre field in 2 days. How many girls will be needed together with 7 boys, if they cultivate 45 acres of field in 6 days?

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

Answer & Explanation Answer: C) 2

Explanation:

Let workdone 1 boy in 1 day be b

and that of 1 girl be g

From the given data,

4(5b + 3g) = 23

20b + 12g = 23 .......(a)

2(3b + 2g) = 7

6b + 4g = 7 ........(b)

Solving (a) & (b), we get

b = 1, g = 1/4

Let number og girls required be 'p'

6(7 x 1 + p x 1/4) = 45

=> p = 2.

Hence, number of girls required = 2

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Filed Under: Time and Work
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Q:

Find the next number in the given number series?

96, 95, 87, 78, ?

A) 64	B) 57
C) 29	D) 14

Answer & Explanation Answer: D) 14

Explanation:

The given number series is 96, 95, 87, 78, ?

It follows a pattern that,

$96 96 - 1^{2} = 95 95 - 2^{3} = 95 - 8 = 87 87 - 3^{2} = 87 - 9 = 78 78 - 4^{3} = 78 - 64 = 14$

Hence, the next number in the given number series is 14.

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Q:

Who began public health and sanitation systems?

A) Mexicans	B) Egyptians
C) Romans	D) Chinese

Answer & Explanation Answer: C) Romans

Explanation:

Romans (753 BC - AD 410) began public health and sanitation systems.

Romans established the first public health and sanitation systems by building sewers and aqueducts.

Romans1531898190.jpg image

They also treated diseases with diet, exercise and meditation.

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Filed Under: World History
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Q:

The part of earth where life exists

A) Biosphere	B) Atmosphere
C) Lithosphere	D) Hydrosphere

Answer & Explanation Answer: A) Biosphere

Explanation:

The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life is called Biosphere.

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Filed Under: General Awareness
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Q:

In a purse there are 30 coins, twenty one-rupee and remaining 50-paise coins. Eleven coins are picked simultaneously at random and are placed in a box. If a coin is now picked from the box, find the probability of it being a rupee coin?

A) 4/7	B) 2/3
C) 1/2	D) 5/6

Answer & Explanation Answer: B) 2/3

Explanation:

Total coins 30

In that,

1 rupee coins 20

50 paise coins 10

Probability of total 1 rupee coins = 20C11

Probability that 11 coins are picked = 30C11

Required probability of a coin now picked from the box is 1 rupee = 20C11/30C11 = 2/3.

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