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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

The average age of 80 boys in a class is 15 years. The average age of a group of 15 boys in the class is 16 years and the average age of another 25 boys in the class is 14 years. What is the average age of the remaining boys in the class?

A) 15.25 years B) 14 years
C) 14.75 years D) Cannot be determined
 
Answer & Explanation Answer: A) 15.25 years

Explanation:

Total sum of age of 80 students of the class = 15 X 80 = 1200 years
15 students → 15 X 16 = 240 years
25 students → 25 X 14 = 350 years
Sum of 40 students = 590 years
Total age of remaining 40 students = 1200 – 590 = 610
So, average age = 15.25 years

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Q:

If 4x2= 152- 92, then value of x is

A) 9 B) 6
C) 3 D) 12
 
Answer & Explanation Answer: B) 6

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

What is the value of 10% of 150% of 400?

A) 600 B) 50
C) 500 D) 60
 
Answer & Explanation Answer: D) 60

Explanation:
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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

In the following question, select the odd number from the given alternatives.

A) 253 B) 473
C) 143 D) 633
 
Answer & Explanation Answer: D) 633

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

Which of the numbers given below is the square root of 14161?

A) 119 B) 121
C) 131 D) 141
 
Answer & Explanation Answer: A) 119

Explanation:
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Filed Under: Square Roots and Cube Roots
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Q:

Find the unit place digit in 71 x 72 x 73 x 74 x 76 x 77 x 78 x 79.

A) 2 B) 0
C) 4 D) 6
 
Answer & Explanation Answer: D) 6

Explanation:
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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

Number of composite numbers lying between 67 and 101 is

A) 27 B) 24
C) 26 D) 23
 
Answer & Explanation Answer: A) 27

Explanation:
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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

Average of all even numbers between 104 and 148 is __________.

A) 128 B) 130
C) 124 D) 126
 
Answer & Explanation Answer: D) 126

Explanation:
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Filed Under: Average
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