6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

A man took loan from a bank at the rate of 12% p.a. simple interest. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was:

A) Rs.2000	B) Rs.10000
C) Rs.15000	D) Rs.20000

Answer & Explanation Answer: C) Rs.15000

Explanation:

Principal = $R s (\frac{100 \times 5400}{12 \times 3}) = R s . 15000$

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Filed Under: Simple Interest
Exam Prep: Bank Exams
Job Role: Bank PO

174 71072

Q:

What is the positive square root of [25 + 4√39]?

A) √13 + 2√3	B) √13 + 3√2
C) √11 + 2√3	D) 11 + 3√2

Answer & Explanation Answer: A) √13 + 2√3

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 70927

Q:

If the cost price of 12 pens is equal to the selling price of 8 pens, the gain percent is ?

A) 12%	B) 30%
C) 50%	D) 60%

Answer & Explanation Answer: C) 50%

Explanation:

Friends, we know we will need gain amount to get gain percent, right. So lets get gain first.

Let the cost price of 1 pen is Re 1

Cost of 8 pens = Rs 8

Selling price of 8 pens = 12

Gain = 12 - 8 = 4

Gain% = $(\frac{g a i n}{\cos t} \times 100)$ % = $(\frac{4}{8} \times 100)$ % = 50%

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Filed Under: Profit and Loss

348 70855

Q:

A rectangular courtyard 3.78 meters long 5.25 meters wide is to be paved exactly with square tiles, all of the same size. what is the largest size of the tile which could be used for the purpose?

A) 14 cms	B) 21 cms
C) 42 cms	D) None of these

Answer & Explanation Answer: B) 21 cms

Explanation:

3.78 meters =378 cm = 2 × 3 × 3 × 3 × 7

5.25 meters=525 cm = 5 × 5 × 3 × 7

Hence common factors are 3 and 7

Hence LCM = 3 × 7 = 21

Hence largest size of square tiles that can be paved exactly with square tiles is 21 cm.

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Filed Under: HCF and LCM

169 70442

Q:

Find x.

693.5 - (47.23 - x) - 82.48 = 8.172.

A) -720.578	B) -555.618
C) -650.078	D) 831.382

Answer & Explanation Answer: B) -555.618

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

5 70029

Q:

Simplify the following and find the value of ?

$\frac{1}{3} of ? + \frac{4}{7} of \frac{11}{4} of 539 = 31 % of 2000$

A) 1134	B) 1237
C) 1187	D) 1249

Answer & Explanation Answer: A) 1134

Explanation:

$\frac{1}{3} x ? + \frac{4}{7} x \frac{11}{4} x 539 = \frac{31}{100} x 2000 ? = 378 x 3 ? = 1134$

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Filed Under: Simplification
Exam Prep: GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

18 69944

Q:

The percentage increase in the area of a rectangle, if each of its sides is increased by 20%

A) 22%	B) 33%
C) 44%	D) 55%

Answer & Explanation Answer: C) 44%

Explanation:

Let original length = x metres and original breadth = y metres.

Original area = xy sq.m

Increased length = $\frac{120}{100}$ and Increased breadth = $\frac{120}{100}$

New area = $\frac{120}{100} x * \frac{120}{100} y = \frac{36}{25} x y m^{2}$

The difference between the Original area and New area is:

$\frac{36}{25} x y - x y$

$\frac{11}{25} x y$ Increase % = $(\frac{\frac{11}{25} x y}{x y}) * 100$ = 44%

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

108 68972

Q:

A person crosses a 600 m long street in 5 minutes, What is his speed in km per hour?

A) 3.6	B) 7.2
C) 8.4	D) 10

Answer & Explanation Answer: B) 7.2

Explanation:

Speed = $(\frac{600}{5 \times 60}) m / s e c$ = 2 m/sec = 2 x (18/5) km/hr = 7.2 km/hr

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Filed Under: Time and Distance

315 68899

Quantitative Aptitude - Arithmetic Ability Questions

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