6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The sum of length, breadth and height of a cuboid is 22 cm and the length of its diagonal is 14 cm.
What is the surface area of the cuboid?

A) 288 sq.cm	B) 216 sq.cm
C) 144 sq.cm	D) Cannot be determined due to insufficient data

Answer & Explanation Answer: A) 288 sq.cm

Explanation:

Let lengths, breadth and height of cuboid be l, b and h respectively

According to question

l+b+h = 22cm......(i)

and

√(l^2+b^2+h^2) = 14cm .....(ii)

Surface area of cuboid = 2(lb+bh+lh)

Squaring eq (i) gives

l^{2} + b^{2} + h^{2}

+ 2(lb+bh+lh) = 484

Substituting l^2+b^2+h^2 from eq (i)

2(lb+bh+lh) = 484 -196 = 288 sq.cm

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Filed Under: Volume and Surface Area
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0 1608

Q:

A shopkeeper, sold dried apricots at the rate Rs 1,310 a kg and bears a loss of 13%. Now if he decides to sell it at Rs 1,441 per kg, what will be the result?

A) 8.6 percent loss	B) 4.3 percent gain
C) 4.3 percent loss	D) 8.6 percent gain

Answer & Explanation Answer: C) 4.3 percent loss

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

The average age of A and B is 18 years. After 3 years, C joins them and the average ages of A, B and C becomes 22 years. The age of C is ?

A) 20 years	B) 21 years
C) 24 years	D) 23 years

Answer & Explanation Answer: C) 24 years

Explanation:

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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and DE are 8 cm, 6 cm and 7.2 cm respectively, find length of BC?

A) 12.6 cm	B) 9.3 cm
C) 8.1 cm	D) 5.4 cm

Answer & Explanation Answer: A) 12.6 cm

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 1607

Q:

If 1 + secA = x, then the value of x is

A) sinAtanA/(1 + cosA)	B) √[sinAtanA/(1 - cosA)]
C) sinAtanA/(1 - cosA)	D) √[sinAtanA/(1 + cosA)]

Answer & Explanation Answer: C) sinAtanA/(1 - cosA)

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If x - y = 7 and xy = 32, then value of $(x^{2} + y^{2})$ is

A) 49	B) 64
C) 113	D) 15

Answer & Explanation Answer: C) 113

Explanation:

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Filed Under: Simplification
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Q:

Find the odd word/letters/number pair from the given alternatives.
(A) 5261 (B) 4354 (C ) 7283 (D) 1829

A) A	B) B
C) C	D) D

Answer & Explanation Answer: A) A

Explanation:

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

The marked price of an article is Rs. 5000. But due to a special festive offer a certain percent of discount is declared. Mr. X availed this oppurtunity and bought the article at reduced price. He then sold it at Rs. 5000 and thereby made a profit of 11 1/9%. The percentage of discount allowed was?

A) 10	B) 10/3
C) 15/2	D) 100/9

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