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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

If cos ­-11π/6 = x, then the value of x is

A) -√3/2 B) 1/2
C) -2 D) √3/2
 
Answer & Explanation Answer: D) √3/2

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

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

A) FUGT B) KPLO
C) DWEV D) CWDX
 
Answer & Explanation Answer: D) CWDX

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT

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Q:

In the following question, select the odd letter/letters from the given alternatives.

A) OKGC B) TPLH
C) XSOK D) YUQM
 
Answer & Explanation Answer: C) XSOK

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

A) 2 hours B) 6 hours
C) 16 hours D) 3 hours
 
Answer & Explanation Answer: C) 16 hours

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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )

A) (a(b-c))/(a-c) B) ((b-c)/(a-c))
C) ((b-c)/10(a-c)) D) (10(b-c))/(a_c))
 
Answer & Explanation Answer: D) (10(b-c))/(a_c))

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Filed Under: Quantitative Aptitude - Arithmetic Ability

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Q:

How many natural numbers are there between √261 and √45109?

A) 144 B) 196
C) 168 D) 195
 
Answer & Explanation Answer: B) 196

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

A mixture contains spirit and water in the ratio of 3 : 2. If it contains 3 litres more spirit than water, the quantity of spirit in the mixture is

A) 12 litres B) 10 litres
C) 9 litres D) 8 litres
 
Answer & Explanation Answer: C) 9 litres

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Filed Under: Alligation or Mixture
Exam Prep: Bank Exams

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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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Filed Under: Average
Exam Prep: Bank Exams

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