Aptitude and Reasoning Questions

Q:

What is the difference between the compound interests on Rs. 5000 for 112 years at 4% per annum compounded yearly and half-yearly?

A) Rs.3.06 B) Rs.2.04
C) Rs.3.65 D) Rs.5.40
 
Answer & Explanation Answer: B) Rs.2.04

Explanation:

 C.I. when interest compounded yearly

Rs.5000*1+4100*1+12*4100

 Rs.5000*2625*5150

=Rs.5034

 

C.I. when interest iscompounded half-yearly 

 Rs.5000*1+21003

= Rs. 5306.04

Difference = Rs. (5306.04 - 5304) = Rs. 2.04

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Filed Under: Compound Interest
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Q:

Hemavathi cut a cake into two halves and cuts one half into smaller pieces of equal size. Each of the small pieces is fifteen grams in weight. If she has nine pieces of the cake in all with her, how heavy was the original cake ?

A) 240 gms B) 280 gms
C) 180 gms D) 170 gms
 
Answer & Explanation Answer: A) 240 gms

Explanation:

The nine pieces consist of 8 smaller equal pieces and one half cake piece.
Weight of each small piece = 15 g.
So, total weight of the cake = [2 x (15 x 8)]g = 240 g.

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Filed Under: Arithmetical Reasoning
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Q:

Malaria : Disease :: Spear : ?

A) Death B) Weapon
C) Sword D) Wound
 
Answer & Explanation Answer: B) Weapon

Explanation:

Second denotes the class to which the first belongs to. Here Malaria belongs to disease class and similarly, Spear belongs to weapon class.

 

Hence,  Malaria : Disease :: Spear : Weapon.

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Filed Under: Analogy
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Q:

3, 6, 17.5, 64.75, ?

A) 304.587 B) 295.875
C) 115.246 D) 101
 
Answer & Explanation Answer: B) 295.875

Explanation:

3

3 x 1.5 + 1.5 = 6

6 x 2.5 + 2.5 = 17.5

17.5 x 3.5 + 3.5 = 64.75

64.75 x 4.5 + 4.5 = 295.875

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Filed Under: Number Series
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Q:

Maneela, Raghu and Aravind have some jems with each of them. Five times the number of jems with Raghu equals seven times the number of jems with Maneela while five times the number of jems with Maneela equals seven times the number of jems with Aravind. What is the minimum number of jems that can be there with all three of them put together ?

A) 108 B) 107
C) 109 D) 110
 
Answer & Explanation Answer: C) 109

Explanation:

From given data,

R : M = 5 : 7

M : A = 5 : 7

R : M : A = 25 : 35 : 49

25 + 35 + 49 = 109

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Filed Under: Ratios and Proportions
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Q:

Whale : Mammal :: Rat : ?

A) Rodent B) Mammal
C) Amphibian D) Reptile
 
Answer & Explanation Answer: A) Rodent

Explanation:

Whale belongs to Mammal category whereas Rat belongs to Rodent.

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Filed Under: Analogy
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Q:

There are 5 consecutive odd numbers. If the difference between square of the average of first two odd number and the of the average last two odd numbers is 396, what is the smallest odd number?

A) 29 B) 27
C) 31 D) 33
 
Answer & Explanation Answer: A) 29

Explanation:

Let the five consecutive odd numbers be x-4, x-2, x, x+2, x+4

According to the question,

Difference between square of the average of first two odd number and the of the average last

two odd numbers is 396

i.e, x+3 and x-3

x + 32 - x - 32 = 396 x2 + 9 + 6x - x2 + 6x - 9 = 396 12x = 396 x = 33

 

Hence, the smallest odd number is 33 - 4 = 29.

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Filed Under: Problems on Numbers
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Q:

Population of a colony of mosquitoes is increasing by 20% per day. If the population on Monday was 3000, on which day of that week the population would be 5184 ?

A) Thursday B) Friday
C) Tuesday D) Monday
 
Answer & Explanation Answer: A) Thursday

Explanation:

Given monday population = 3000
Per day 20% increase in population.

Tuesday population = 3000 + 3000x20/100 = 3000 + 600 = 3600

Wednesday population =3600 + 3600x20/100 = 3600 + 720 = 4320

Thursday population = 4320 + 4320x20/100 = 4320 + 864 = 5184

So that day is Thursday.

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Filed Under: Percentage
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