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Q:

Nitrogen Fixation is carried out primarily by

A) Plants	B) Humans
C) Consumers	D) Bacteria

Answer & Explanation Answer: D) Bacteria

Explanation:

The process by which bacteria convert nitrogen gas (N2) into ammonia (NH3) is called Nitrogen Fixation.

The conversion of nitrogen from one form to another in the nitrogen cycle is carried out primarily by Nitrogen Fixing Bacteria such as Azotobacter.

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Filed Under: Biology
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Q:

3 divided by 1/3?

A) 1	B) 0
C) 9	D) None

Answer & Explanation Answer: C) 9

Explanation:

3 divided by 1/3

=> $\frac{3}{\frac{1}{3}}$

= 3 x 3/1

= 9

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Filed Under: Arithmetical Reasoning
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Q:

If a soldier fires 7 shots from a gun in 12 minutes then find the total number of shots fired by the man in 3/2 hrs.

A) 45	B) 44
C) 46	D) 47

Answer & Explanation Answer: C) 46

Explanation:

Here given soldier shots 7 shots in 12 min

=> 1 shot doen't take any time in 12 min

=> Only 6 shots take 12 min

12 min ------ 6 shots

90 min ------ ? shots

=> 90 x (6/12) = 45

Therefore, total shots fired in 90 minutes = 45 + 1 = 46 shots.

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Filed Under: Time and Work
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Q:

The book "Two Year Eight Months and Twenty –Eight Night" is authored by

A) Salman Rushdi	B) Deepak Nayyar
C) Javier Moro	D) Khurshid M Kasuari

Answer & Explanation Answer: A) Salman Rushdi

Explanation:

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Filed Under: Books and Authors
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Q:

0 divided by 0

A) 0	B) 1
C) Undefined	D) Indeterminate

Answer & Explanation Answer: D) Indeterminate

Explanation:

Indeterminate are those,which mathematics can’t determine.

Because we don’t actually know which one is the exact answer for this due to having lots of results for this.

Explanation::

Let us think by this analogy that,

0 / 1 = 0

0 / 2 = 0

…………

………..

we can say 0 / n = 0 from this we can write, 0/0 = 0

Again, another analogy,(from limiting concept of 1/0 = infinity)

1 / 0 = +∞ or -∞

2 /0 = +∞ or -∞

………

.…….

we can say 0 / 0 = ∞

Again, another analogy,

1 / 1 = 1

2/2 = 1

.……..

………..

we can say, 0/0 = 1

Now, you see it’s confusing. Every analog is mathematically correct then which one is the right answer for 0/0. Therefore Mathematics can’t determine this fact.

So, 0/0 is indeterminate.

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Filed Under: Arithmetical Reasoning
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Q:

Rearrange the following sentences (A), (B), (C), (D), (E) and (F) in the proper sequence to form a meaningful paragraph, then answer the questions given below them.

(A) But those apps are just a hint of what this Internet behemoth offers

(B) Gmail, Google maps, and Blogger are used widely.

(C) By now, most know that Google is about far more than search.

(D) Under the hood of its famous search engine. (F) You may not know about, but probably should

(E) Here’s a rundown of some useful Google gems that

A) DECBFA	B) EDCFBA
C) BCDAEF	D) DCEBFA

Answer & Explanation Answer: B) EDCFBA

Explanation:

The rearranged sentences are ::

(D) By now, most know that Google is about far more than search.(C) Gmail, Google maps, and Blogger are used widely.(B) But those apps are just a hint of what this Internet behemoth offers (E) under the hood of its famous search engine.(A) Here’s a rundown of some useful Google gems that (F) you may not know about, but probably should.

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Filed Under: Deriving Conclusions From Passages
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Q:

The length of a class room floor exceeds its breadth by 25 m. The area of the floor remains unchanged when the length is decreased by 10 m but the breadth is increased by 8 m. The area of the floor is

A) 5100 sq.m	B) 4870 sq.m
C) 4987 sq.m	D) 4442 sq.m

Answer & Explanation Answer: A) 5100 sq.m

Explanation:

Let the breadth of floor be 'b' m.

Then, length of the floor is 'l = (b + 25)'

Area of the rectangular floor = l x b = (b + 25) × b

According to the question,

(b + 15) (b + 8) = (b + 25) × b

$b^{2} + 8 b + 15 b + 120 = b^{2} + 25 b$

2b = 120

b = 60 m.

l = b + 25 = 60 + 25 = 85 m.

Area of the floor = 85 × 60 = 5100 sq.m.

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Filed Under: Area
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Q:

Friction can be reduced by changing from

A) Static to Dynamic	B) Rolling to Sliding
C) Dynamic to Static	D) Sliding to Rolling

Answer & Explanation Answer: D) Sliding to Rolling

Explanation:

Any object rolls when there is no friction. So, Sliding to Rolling is correct.

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Filed Under: Physics
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