6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )

A) (a(b-c))/(a-c)	B) ((b-c)/(a-c))
C) ((b-c)/10(a-c))	D) (10(b-c))/(a_c))

Answer & Explanation Answer: D) (10(b-c))/(a_c))

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability

0 1934

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
Exam Prep: Bank Exams

0 1934

Q:

If a:b = 5:8, find the value of (6a - 5b)/(a + 2b).

A) 10/21	B) -21/10
C) 21/10	D) -10/21

Answer & Explanation Answer: D) -10/21

Explanation:

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

0 1934

Q:

On selling 30 caps, a shopkeeper earns profit equal to the selling price of 3 caps. What is the profit percentage?

A) 12.5	B) 11.11
C) 10	D) 14.28

Answer & Explanation Answer: B) 11.11

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

5 1933

Q:

A man travelled a distance of 60 km in 7 hours. He travelled partly on foot @ 6 km/hr and partly on bicycle @ 12 km/hr. What is the distance (in kms) travelled on foot?

A) 15	B) 9
C) 48	D) 24

Answer & Explanation Answer: D) 24

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Filed Under: Time and Distance
Exam Prep: Bank Exams

5 1932

Q:

The average height of 40 sticks is 154 cm. Some sticks of average height 160 cm are taken out. If the new average height is 150 cm, then how many sticks are remaining?

A) 12	B) 16
C) 24	D) 28

Answer & Explanation Answer: C) 24

Explanation:

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Filed Under: Average
Exam Prep: Bank Exams

3 1932

Q:

A bag has Rs 43 in the form of 5-rupee, 50-paise and 10-paise coins in the ratio of 1:5:11. What is the total number of 50-paise coins?

A) 5	B) 25
C) 55	D) 50

Answer & Explanation Answer: B) 25

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

1 1932

Q:

If Giridhar's salary is 5/3 times of Hariraj's and Shaunak's is 2/3 times of Hariraj's, what is the ratio of Giridhar's salary to Shaunak's.

A) 9:10	B) 10:9
C) 5:2	D) 2:5

Quantitative Aptitude - Arithmetic Ability Questions

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