Exams


Q:

At what rate percent per annum will a sum of money double in 8 years.

A) 12.5% B) 13.5%
C) 11.5% D) 14.5%
 
Answer & Explanation Answer: A) 12.5%

Explanation:

Let principal = P, Then, S.I.= P and Time = 8 years

 

We know that S.I. = PTR/100

 

Rate = [(100 x P)/ (P x 8)]% = 12.5% per annum.

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Filed Under: Simple Interest
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454 75244
Q:

Hydrogen bomb is based on the principle of  

A) nuclear fission B) nuclear fusion
C) natural radioactivity D) artificial radioactivity
 
Answer & Explanation Answer: B) nuclear fusion

Explanation:

Hydrogen Bomb is based on the principle of Nuclear Fusion.

Hydrogen_bomb_is_based_on_the_principle_of1552385714.jpg image

 

  • Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles.

 

  • The difference in mass between the reactants and products is manifested as either the release or absorption of energy.
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Filed Under: Chemistry
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Q:

A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: C) 3

Explanation:

Area of the park = (60 x 40) = 2400m2

Area of the lawn = 2109m2 

Area of the crossroads = (2400 - 2109) = 291m2 

Let the width of the road be x metres. Then,

60x+40x-X2=291 

x2-100x+291=0 

  (x - 97)(x - 3) = 0
   x = 3.

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Filed Under: Area
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Q:

10 25 45 54 60 75 85

Find the Odd Number?

A) 54 B) 10
C) 45 D) 85
 
Answer & Explanation Answer: A) 54

Explanation:

In given Series, all the numbers except 54 are multiples of 5.

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Filed Under: Odd Man Out
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Q:

How many such pairs of digits are there in the number 421579368 each of which has as many digits between them in the number as when they are arranged in ascending order?

A) None B) One
C) Two D) Three
 
Answer & Explanation Answer: D) Three

Explanation:

Given Number:     4  2  1  5  7  9  3  6  8

 

Ascending order:  1  2  3  4  5  6  7  8  9

 

Hence the required pairs are  12, 49, 16

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Filed Under: Number, Ranking and Time Sequence Test
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1128 73114
Q:

Vaunt : Flaunt :: Disparate : ?

A) Similar B) Homogenous
C) Contrast D) Alike
 
Answer & Explanation Answer: C) Contrast

Explanation:

Vaunt - Vaunt means to boast or to praise about something excessively.

Flaunt - Flaunt also means to boast about something or to praise something.

 

Flaunt is the synonym of the word Vaunt.

 

Disparate - Disparate means essentially different in its kind or unlike or not able to be compared.

Then the required word is the synonym of Disparate.

 

Here in the given options, Contrast is the only word which is similar in meaning of Disparate.

 

Hence, Vaunt : Flaunt :: Disparate : Contrast.

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Filed Under: Analogy
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Q:

206 B in a B?

Answer

206 Bones in the Human Body.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE
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268 71366
Q:

A sum of money amounts to Rs.6690 after 3 years and to Rs.10,035 after 6 years on compound interest.find the sum.

A) 4360 B) 4460
C) 4560 D) 4660
 
Answer & Explanation Answer: B) 4460

Explanation:

Let the sum be Rs.P.then
P(1+R/100)^3=6690…(i) and P(1+R/100)^6=10035…(ii)
On dividing,we get (1+R/100)^3=10025/6690=3/2.
Substituting this value in (i),we get:
P*(3/2)=6690 or P=(6690*2/3)=4460
Hence,the sum is rs.4460.

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Filed Under: Compound Interest
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