6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The Present worth of Rs.2310 due $2 \frac{1}{2}$ years hence ,the rate of interest being 15% per annum, is :

A) Rs.1440	B) Rs.1750
C) Rs.1680	D) Rs.1840

Answer & Explanation Answer: C) Rs.1680

Explanation:

$P . W = R s . (\frac{100 \times 2310}{100 + (15 \times \frac{5}{2})})$ = Rs.1680

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Filed Under: True Discount

0 9289

Q:

If $\sqrt{0.00000676} = 0.0026$ then $\sqrt{6760000}$ is:

A) 2.6	B) 26
C) 260	D) 2600

Answer & Explanation Answer: D) 2600

Explanation:

$\sqrt{6760000} = \sqrt{0.00000676 \times 10^{2}} = \sqrt{0.00000676} \times \sqrt{10^{2}} = 0.0026 \times 10^{6} = 2600$

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Filed Under: Square Roots and Cube Roots

38 9287

Q:

10 men, working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the work in 12 days ?

A) 4 hours a day	B) 5 hours a day
C) 6 hours a day	D) 7 hours a day

Answer & Explanation Answer: C) 6 hours a day

Explanation:

More Men, Less Hours {Indirect Proportion}

Less Days, More Hours {Indirect Proportion}

$\begin{array}{r} \begin{matrix} m e n & 15 : 10 \end{matrix} \\ \begin{matrix} d a y s & 12 : 18 \end{matrix} \end{array}\} ⋮ ⋮ 6 : x$

=> 15 * 12 * x = 10 * 18 * 6

=>x = 6

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Filed Under: Chain Rule

8 9279

Q:

A retailer buys product from a shopkeeper at discount of 40% on the list price (marked price) and sells them to the customer at a discount of 25% on the list price.What is his profit percentage ?

A) 10%	B) 15%
C) 20%	D) 25%

Answer & Explanation Answer: D) 25%

Explanation:

Let the list price be Rs.100.

Therefore, the retailer is buying the products at Rs.60 and selling it to the customer at Rs.75, earning a profit of Rs.15.

Therefore, his percentage is = $\frac{15}{60} x 100$ = 25%

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Filed Under: Profit and Loss
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

17 9273

Q:

If 12 men can reap 120 acres of land in 36 days, how many acres of land can 54 men reap in 54 days?

A) 710 acres	B) 760 acres
C) 810 acres	D) 860 acres

Answer & Explanation Answer: C) 810 acres

Explanation:

$\begin{matrix} 12 m e n & 120 a c r e s & 36 d a y s \\ 54 m e n & ? & 54 d a y s \end{matrix}$

As 12 men can reap 120 acres, 54 men will be able to reap more acres in 36 days, 120 acres of land was reaped, so in 54 days, more land will be reaped.

Thus, the numbers of acres that can be reaped by 54 men in 54 days = $\frac{54}{12} x 120 x \frac{54}{36}$ = 810 acres

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Filed Under: Ratios and Proportions
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

19 9264

Q:

A certain sum is invested at simple interest at 18% p.a. for two years instead of investing at 12% p.a. for the same time period. Therefore the interest received is more by Rs. 840. Find the sum ?

A) Rs. 5858	B) Rs. 8800
C) Rs. 7000	D) Rs. 6350

Answer & Explanation Answer: C) Rs. 7000

Explanation:

Let the sum be Rs. S.
(S x 18 x 2)/100 - (S x 12 x 2)/100 = 840 => 36S/100 - 24S/100 = 840

=> 12S/100 = 840 => S = 7000.

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Filed Under: Simple Interest
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

3 9258

Q:

(0.2 * 0.2 + 0.01) ( 0.1 * 0.1 + 0.02)^(-1) is equal to :

A) 5/3	B) 9/3
C) 11/3	D) 13/3

Answer & Explanation Answer: A) 5/3

Explanation:

Given = (0.2 * 0.2 + 0.01) / ( 0.1 * 0.1 + 0.02) = (0.04 + 0.01) / (0.01 + 0.02) = 0.05 / 0.03 = 5/3...

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Filed Under: Decimal Fractions

12 9247

Q:

In a simultaneous throw of two dice, what is the probability of getting a total of 7 ?

A) 1/6	B) 1/4
C) 1/20	D) 3/4

Quantitative Aptitude - Arithmetic Ability Questions

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