Bank Exams Questions

Q:

If cosec 135° = x, then the value of x is

A) √2 B) 2
C) -√2 D) 1/√3
 
Answer & Explanation Answer: A) √2

Explanation:
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Q:

Which one of the following cities was not included in the list of smart cities in India?

A) Silvassa B) Jorhat
C) Itanagar D) Kavaratti
 
Answer & Explanation Answer: B) Jorhat

Explanation:

Silvassa is in Dadra and Nagar Haveli.Kavarati is capital of Lakshadweep. Itanagar is capital of Arunachal PradeshThese three were originally included in smart city list.Assam government has sent a proposal for Jorhat to be included in smart city list. But it has not yet been included.

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Filed Under: Indian Geography
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Q:

What is the sum of all 3 digits number that can be formed using digits 0,1,2,3,4,5 with no repitition ?

A) 28450 B) 26340
C) 32640 D) 36450
 
Answer & Explanation Answer: C) 32640

Explanation:

We know that zero can't be in hundreds place. But let's assume that our number could start with zero.

 

The formula to find sum of all numbers in a permutation is

 

111 x no of ways numbers can be formed for a number at given position x sum of all given digits

 

No of 1 s depends on number of digits

 

So,the answer us

 

111 x 20 x (0+1+2+3+4+5) = 33300

 

We got 20 as follows. If we have 0 in units place we can form a number in 4*5 ways. This is for all numbers. So we have substituted 20 in formula.

 

Now, this is not the final answer because we have included 0 in hundreds place. so we have to remove the sum of all numbers that starts with 0.

 

This is nothing but the sum of all 2 digits numbers formed by 1 2 3 4 5. Because 0 at first place makes it a 2 digit number.

 

So the sum for this is 11 x 4 x (1+2+3+4+5).
=660

 

Hope u understood why we use 4. Each number can be formed in 4x1 ways

 

So, the final answer is 33300-660 = 32640

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Filed Under: Permutations and Combinations
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Q:

Why are manhole covers round?

Answer

A number of possible explanations for why manhole covers are round include :


 


1. A round manhole cover cannot fall through its circular opening, whereas a square, rectangular, or oval manhole cover could fall in if it were inserted diagonally in the hole.


2. Circular covers don’t need to be rotated or precisely aligned when placing them on the opening.


3. A round manhole cover is easily moved and rolled.


4. Human beings have a roughly circular cross-section.


5. Round tubes are the strongest shape against the compression of the earth around them, so the cover of the tube would naturally be round as well.


6. It’s easier to dig a circular hole.

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Q:

Laterite is chemically classified as

A) argillaceous rock B) metamorphic rock
C) caleareous rock D) sillcious rock
 
Answer & Explanation Answer: A) argillaceous rock

Explanation:
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Filed Under: Chemistry
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Q:

Synonym of Sad?

A) Glad B) Lucky
C) Somber D) Fortunate
 
Answer & Explanation Answer: C) Somber

Explanation:

Sad means being unhappy, sorrowful, mournful, wistful,...

 

Hence, Somber means cheerless i.e, unhappy which is synonym of sad. All other options are opposites of Sad.

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Filed Under: English
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Q:

Farmers' cooperatives were most common among

A) Cotton producers B) Grain producers
C) Fruit growers D) Tobacco growers
 
Answer & Explanation Answer: C) Fruit growers

Explanation:
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Filed Under: Indian Geography
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Q:

One billionth of a second is called

A) microsecond B) picoseconds
C) millisecond D) nanosecond
 
Answer & Explanation Answer: D) nanosecond

Explanation:

A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second or one billionth of a second.

 

  • That is, 1/1,000,000,000 of a second, or 10^−9 seconds.
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Filed Under: Physics
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