6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

A trader sells wire and gains 60% on the cost price. What will be the profit % on selling price?

A) 33.33	B) 40
C) 60	D) 37.5

Answer & Explanation Answer: D) 37.5

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

5 2307

Q:

The average of 41 consecutive odd numbers is 49. What is the largest number.

A) 89	B) 91
C) 93	D) 95

Answer & Explanation Answer: A) 89

Explanation:

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Filed Under: Average
Exam Prep: Bank Exams

1 2306

Q:

A, B and C can together do a job in 9 days. C alone can do the job in 36 days. In how many days can A and B do 50% of the job working together?

A) 6	B) 12
C) 9	D) 15

Answer & Explanation Answer: A) 6

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

0 2306

Q:

If $\frac{a}{b + c} = \frac{b}{c + a} = \frac{C}{b + a}$ then which one of the following statements is correct?

A) Each fraction is equal to 1 or -1	B) Each fraction is equal to 1/2 or 1
C) Each fraction is equal to 1/2 or -1	D) Each fraction is equal to 1.2 only

Answer & Explanation Answer: C) Each fraction is equal to 1/2 or -1

Explanation:

a/(b+c) = b/(c+a) = c/(a+b)

Taking reciprocal and adding 1 to each ratio we get;

(b+c)/a + 1 = b/(c+a) + 1 = c/(a+b) + 1

Or (a+b+c)/a = (a+b+c)/b = (a+b+c)/c

So this can only be equal when a=b=c or a+b+c = 0

When a=b=c we get

a/(b+c)= ½When a+b+c = 0 we get

b+c = -a

So a/(b+c) = -1

So the ratios are ½ or -1

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

In the question given below, two equations are provided. Solve the equations and establish the relationship between x and y

$I . 2 x^{2} - 13 x - 189 = 0 II . 2 y^{2} - 3 y - 189 = 0$

A) x>y	B) x≥y
C) x<y	D) x≤y

Answer & Explanation Answer:

Explanation:

I. 2x2 - 13x - 189 = 0 2x2 - 27x + 14x - 189 = 0 x(2x - 27) + 7(2x - 27) = 0 x = -7, 27/2

II. 2y2 - 3y - 189 = 0 2y2 - 21y + 18y - 189 = 0 y(2y - 21) + 9(2y - 21) = 0 y = -9, 21/2

When x, as well as y, have both positive and negative values then no relationship can be established between them because if we consider x to be positive then the negative value of y will be lesser than x. If we consider x to be negative then positive value of y will be greater than x.

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Filed Under: Simplification

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Q:

If x = 222, y = 223, z = 225 then the value of $x^{3} + y^{3} + z^{3} - 3 xyz$ is

A) 4590	B) 4690
C) 4950	D) 4960

Answer & Explanation Answer: B) 4690

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

A trader sold a cycle at a loss of 10%. If the selling price had been increased by Rs. 200, there would have been a gain of 6%. The cost price of the cycle is

A) Rs.1200	B) Rs.1205
C) Rs.1250	D) Rs.1275

Answer & Explanation Answer: C) Rs.1250

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

1 2302

Q:

On dividing $24 a^{2} b^{2} by 6 b^{2}$ , we will get

A) 4b	B) 4ab
C) 4	D) 4a2

Quantitative Aptitude - Arithmetic Ability Questions

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