Aptitude and Reasoning Questions

Q:

The amount of water (in ml) that should be added to reduce 9 ml lotion, containing 50% alcohol, to a lotion containing 30% alcohol is ?

A) 6 ml B) 11 ml
C) 15 ml D) 9 ml
 
Answer & Explanation Answer: A) 6 ml

Explanation:

Let us assume that the lotion has 50% alcohol and 50% water.
ratio = 1:1
As the total solution is 9ml
alcohol = water = 4.5ml
Now if we want the quantity of alcohol = 30%
The quantity of water = 70%
The new ratio = 3:7
Let x ml of water be added
We get,
4.54.5+x = 37
=> x=6
Hence 6ml of water is added.

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Filed Under: Alligation or Mixture
Exam Prep: GRE , GATE , CAT , Bank Exams , AIEEE
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29 17825
Q:

In the following question, select the missing number from the given series.

13, 17, 19, 23, 29, ?

A) 33 B) 31
C) 35 D) 37
 
Answer & Explanation Answer: B) 31

Explanation:
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Filed Under: Number Series
Exam Prep: Bank Exams

1 17805
Q:

What is the value of P in the following Equation ?

 192.5 × 19p = 197

A) 3.9 B) 4.1
C) 3.7 D) 4.5
 
Answer & Explanation Answer: D) 4.5

Explanation:

Given equation is  

  192.5 ×19p = 197   

Here it is in the form of am × an = am+n  

 Here m = 2.5 , n = p, m+n = 7

 => 2.5 + p = 7 

 => p = 7 - 2.5

 => p = 4.5

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Filed Under: Mathematical Operations
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25 17799
Q:

In the following question, select the missing number from the given series.

 

87, 62, 42, 27, 17, ?

 

A) 7   B) 12  
C) 8   D) 10
 
Answer & Explanation Answer: B) 12  

Explanation:
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Filed Under: Number Series
Exam Prep: Bank Exams

4 17791
Q:

Which of the following terms follows the trend of the given list?

 

BBAAAAA, ABBAAAA, AABBAAA, AAABBAA, AAAABBA, _______________.

 

A) BBAAAAA   B) AABBAAA  
C) AAAAABB   D) ABBAAAA
 
Answer & Explanation Answer: C) AAAAABB  

Explanation:
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Filed Under: Alphabet Test
Exam Prep: Bank Exams

2 17781
Q:

From the word 'ASTOUNDER', how many independent words can be made with-out changing the order of the letters and using each letter only once ? 

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

Explanation:

The words formed are

AT and UNDER, AS and UNDER (or) AT and SOUND 

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124 17771
Q:

The ratio of the ages of Maala and Kala is 4 : 3. The total of their ages is 2.8 decades. The proportion of their ages after 0.8 decades will be [1 Decade = 10 years]

A) 4:3 B) 12:11
C) 7:4 D) 6:5
 
Answer & Explanation Answer: D) 6:5

Explanation:

Let, Maala’s age = 4A and Kala’s age = 3A
Then 4A + 3A = 28
A = 4
Maala’s age = 16 years
and Kala’s age = 12 years
Proportion of their ages after 8 is = (16 + 8) : (12 + 8)
= 24 : 20
= 6 : 5

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Filed Under: Problems on Ages

41 17771
Q:

An equilateral triangle is described on the diagonal of a square. What is the ratio of the area of the triangle to that of the square?

A) 1:2 B) 1:3
C) 2:3 D) 3^(1/2) :2
 
Answer & Explanation Answer: D) 3^(1/2) :2

Explanation:

area of a square = a² sq cm

 

length of the diagonal = 2a cm

 

area of equilateral triangle with side  2a= 34*2a2
required ratio = 34*2a2:a2=3:2

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

14 17761