6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

P and Q can complete a task in 50 and 20 days respectively. In how many days can they complete 70% of the task if they work together?

A) 20 days	B) 20 days
C) 40 days	D) 10 days

Answer & Explanation Answer: D) 10 days

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

1 1158

Q:

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

A) 7	B) 3.5
C) 5	D) 7.5

Answer & Explanation Answer: D) 7.5

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

Three consecutive integers form the lengths of a right-angled triangle. How many sets of such three consecutive integers is/are possible?

A) Only one	B) Only two
C) Only three	D) Infinitely many

Answer & Explanation Answer: A) Only one

Explanation:

let n-1, n, n+1 be 3 consecutive integers

So

(n+1)^2= n^2+ (n-1)^2

(n+1)^2-(n-1)^2= n^2

4n = n^2

So n = 0 or n = 4

n can’t be 0 as n-1 will be negative then

So 3,4 and 5 is the only triplet formed.

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

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Q:

What is the area (in sq cm) of a rhombus if the lengths of its diagonals are 25 cm and 20 cm?

A) 500	B) 250
C) 125	D) 200

Answer & Explanation Answer: B) 250

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

ax + 3y = 6 has slope -2/3. What is the value of a?

A) -2	B) 2
C) 3	D) -3

Answer & Explanation Answer: B) 2

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If $\frac{a^{2} + b^{2}}{c^{2}} = \frac{b^{2} + c^{2}}{a^{2}} = \frac{c^{2} + a^{2}}{b^{2}} = \frac{1}{k} (k \neq 0)$ then k =

A) 2	B) 1
C) 0	D) 1/2

Answer & Explanation Answer: D) 1/2

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If a - b = 2 and ab = 15, then what is the value of $a^{3} - b^{3}$ ?

A) 152	B) 112
C) 108	D) 98

Answer & Explanation Answer: D) 98

Explanation:

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Q:

The incomes of S and T are in the ratio 3 : 4 and their expenditures are in the ratio 1 : 1. If S saves Rs 4000 and T saves Rs 22000, then what will be the income (in Rs) of S?

A) 45000	B) 54000
C) 60000	D) 65000

Quantitative Aptitude - Arithmetic Ability Questions

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