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Q:

How many 4-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated?

A) 60 B) 48
C) 36 D) 20
 
Answer & Explanation Answer: A) 60

Explanation:

Here given the required digit number is 4 digit.

It must be divisible by 5. Hence, the unit's digit in the required 4 digit number must be 0 or 5. But here only 5 is available.

x x x 5

The remaining places can be filled by remaining digits as 5 x 4 x 3 ways.

 

Hence, number 4-digit numbers can be formed are 5 x 4 x 3 = 20 x 3 = 60.

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Filed Under: Permutations and Combinations
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Q:

Which of the following is a rational number?

A) 0.241 B) 1.732
C) 4 D) All of the above
 
Answer & Explanation Answer: C) 4

Explanation:

Any number which can be expressed as a fraction of two integers like P & Q as P/Q where Q is not equal to zero.

Every integer is a rational number since Q can be 1.

 

Hence, in the given options, 4 can be expressed as a simple fraction as 4/1. And all other options cannot be expressed as fractions.

 

Hence, 4 is a rational number in the given options.

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Filed Under: Numbers
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Q:

Find the missing number in the given number series?

1 8 36 ? 1100 7701

A) 97 B) 129
C) 164 D) 183
 
Answer & Explanation Answer: D) 183

Explanation:

The given number series is 1 8 36 ? 1100 7701

It follows a pattern that,

 

1

1 x 3 + 5 = 8

8 x 4 + 4 = 36

36 x 5 + 3 = 183

183 x 6 + 2 = 1100

1100 x 7 + 1 = 7701

 

Hence, the missing number in the given series is 183.

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Filed Under: Number Series
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Q:

The strength of an electromagnet can be increased by

A) increasing the length of the coiled wire B) increasing current supply
C) increasing the number of turns D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The strength of an electromagnet can be increased by increasing the cross-sectional area, increasing the number of turns, increasing current supply, increasing the length of the coiled wire.

 

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Filed Under: Physics
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Q:

Which operation is not performed by computer?

A) Understanding B) Controlling
C) Processing D) Inputting
 
Answer & Explanation Answer: A) Understanding

Explanation:

A computer can perform inputting, processing and cotrolling but it can't perform understanding as it is has no brain. It can't earn from its previous experiances.

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Filed Under: Computer
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Q:

One who believes in fate?

A) determinist B) predestinarianist
C) fatalist D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A person that believes completely in fate is a fatalist, or sometimes predestinarianist or determinist.

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Filed Under: English
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Q:

Give me a word that means the opposite of dull?

A) Sharp B) Bright
C) Exciting D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Dull means not sharp, not shining, not bright, ...

 

Hence, the given words are all that means the opposite of dull.

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Filed Under: English
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Q:

Words to describe a beautiful woman?

A) Gorgeous B) Cute
C) Elegant D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Words to describe a beautiful woman are :: appealing, fair, charming, fascinating, dazzling, fetching, angelic, fine, delicate, delightful, divine, beauteous, ...

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Filed Under: English
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