6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Out of the 60 students of a class, 29 took Mathematics, 32 took Biology and 8 took none of the two subjects. How many students took both Mathematics and Biology?

A) 8	B) 9
C) 7	D) 6

Answer & Explanation Answer: B) 9

Explanation:

Number of students who took only Mathematics n(m) = 29
Number of students who took only biology n(b) = 32
Total number of students n(t) = 60
Total number of students of both mathematics and biology n(m b) = 60 - 8 = 52
Total number of students who took both = 32 + 29 - 52 = 9

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

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Q:

If three numbers are in the ratio 2 : 3 : 5 and the twice their sum is 100. Find the square of the largest of the three numbers.

A) 225	B) 625
C) 25	D) 100

Answer & Explanation Answer: B) 625

Explanation:

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

A bank offers 20% compound interest calculated on half year basis. A customer deposits Rs 9200 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is

A) Rs 11776	B) Rs 2944
C) Rs 1472	D) Rs 5888

Answer & Explanation Answer: D) Rs 5888

Explanation:

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Filed Under: Compound Interest
Exam Prep: Bank Exams

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Q:

If $a^{3} + b^{3} = 19$ and ab = -6 , then what is the value of a + b?

A) 5	B) 7
C) 1	D) -5

Answer & Explanation Answer: C) 1

Explanation:

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Exam Prep: Bank Exams

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Q:

If a - b = -6 and $a^{2} + b^{2} = 44$ , then ab is

A) -4	B) 8
C) 4	D) -8

Answer & Explanation Answer: C) 4

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

The sum of the lengths of the edges of a cube is equal to the perimeter of a square. If the numerical value of the volume of the cube is equal to the numerical value of the area of the square, then the length of one side of the square is

A) 30 units	B) 9 units
C) 27 units	D) 12 units

Answer & Explanation Answer: C) 27 units

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

Which of the following statements is not true?

A) The difference of two prime numbers, both greater than 2, is divisible by 2	B) For two different integers m, n and a prime number p, if p divides the product m × n, then p divides either m or n.
C) If a number is of the form 6n –1 (n being a natural number), then its is a prime number.	D) There is only one set of three prime numbers such that there is a gap of 2 between two adjacent prime numbers.

Answer & Explanation Answer: D) There is only one set of three prime numbers such that there is a gap of 2 between two adjacent prime numbers.

Explanation:

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Filed Under: Numbers
Exam Prep: Bank Exams

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Q:

Find the area (in sq units) enclosed by y = 0, x+6=0 and 2x-3y=6.

A) 9	B) 16
C) 20	D) 27

Quantitative Aptitude - Arithmetic Ability Questions

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