Aptitude and Reasoning Questions

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
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
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3 5163
Q:

Two persons K and L can complete a piece of work in 30 days and 45 days respectively. If they work together, what part of the work will be completed in 3 days ?

A) 1/6 B) 1/3
C) 2/3 D) 1/18
 
Answer & Explanation Answer: A) 1/6

Explanation:

K's one day's work = 1/30
L's one day's work = 1/45
(K + L)'s one day's work = 1/30 + 1/45 = 1/18

The part of the work completed in 3 days = 3 (1/18) = 1/6.

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Filed Under: Time and Work
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

5 5162
Q:

In a bag which contains 40 balls, there are 18 red balls and some green and blue balls. If two balls are picked up from the bag without replacement, then the probability of the first ball being red and second being green is 3/26. Find the number of blue balls in the bag.

A) 16 B) 12
C) 10 D) 14
 
Answer & Explanation Answer: B) 12

Explanation:

Total balls = 40

Red balls = 18

Let green balls are x

Then, (18/40) × (

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Filed Under: Probability
Exam Prep: AIEEE , Bank Exams , CAT

49 5160
Q:

Find the odd man out
2 4 8 16 36

A) 4 B) 8
C) 16 D) 36
 
Answer & Explanation Answer: D) 36

Explanation:

2+2=4

4+4=8

8+8=16

16+16=32 but  it is given 36

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1 5160
Q:

The age of X is 2/3 rd that of Y. After 6 years X will be 46 years old. the present age of Y is?

A) 40 B) 56
C) 60 D) 100
 
Answer & Explanation Answer: C) 60

Explanation:

X= 2/3Y 

=> Y= 3/2X

 

Aage of X after 6 years = 46 years

 

So present age of X = 46-6 = 40 years

 

Now, present age of Y = 3/2 * 40 = 60 years.

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Filed Under: Problems on Ages
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

10 5158
Q:

From a deck of 52 cards, a 5 card hand is dealt.How many distinct hands can be formed if there are atleast 2 queens?

A) 103336 B) 120000
C) 108336 D) 108333
 
Answer & Explanation Answer: C) 108336

Explanation:

The total possible cases would be a 5 card hand with no restrictions :52C5 5

 

The unwanted cases are:

 

no queens(out of 48 non-queens cards we get 5) 48C5

 

only 1 queen(out of 4 queens we get 1,and out of 48 non-queens we get 4) 4C1*48C4

 

Therefore,52C5-(48C5+4C1*48C4) = 108336

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2 5158
Q:

A large cube is formed from the material obtained by melting three smaller cubes of 3,4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?

A) 2 : 1 B) 3 : 2
C) 25 : 18 D) 27 : 20
 
Answer & Explanation Answer: C) 25 : 18

Explanation:

ke

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2 5152
Q:

Study the bar chart and answer the questions based on it.

 

Production of Pesticides by Coromandal International Ltd. Company (in 1000 tonnes)

 

 

The average production of 1996 and 1997 was exactly equal to the average production of which of the following pairs of years?

A) 2000 and 2001 B) 1999 and 2000
C) 1998 and 2000 D) 1995 and 2001
 
Answer & Explanation Answer: D) 1995 and 2001

Explanation:
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Filed Under: Bar Charts
Exam Prep: Bank Exams

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