6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Determine the value of $(\frac{1}{r} + \frac{1}{s})$ when $r^{3} + s^{3} = 0 and r + s = 6$ ?

A) 0	B) 0.5
C) 1	D) 2

Answer & Explanation Answer: B) 0.5

Explanation:

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Filed Under: Square Roots and Cube Roots

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Q:

If a cone of radius 3.5 cm and height 9.6 cm is melted and constructed into a cylinder of the same radius, what will be the height of this cylinder? (Take π = 22/7)

A) 3.2 cm	B) 6.4 cm
C) 1.6 cm	D) 4.8 cm

Answer & Explanation Answer: A) 3.2 cm

Explanation:

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

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Q:

10 identical solid spherical balls of radius 3 cm are melted to form a single sphere. In this process 20% of solid is wasted. What is the radius (in cm) of the bigger sphere?

A) 24	B) 12
C) 8	D) 6

Answer & Explanation Answer: D) 6

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

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Q:

What is the average of first 30 multiples of 9?

A) 142	B) 138.5
C) 139.5	D) 143.5

Answer & Explanation Answer: C) 139.5

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

A 150 m long train, travelling at 54 km/h, crosses a platform in 42 seconds. What is the length of the platform?

A) 540 m	B) 630 m
C) 480 m	D) 780 m

Answer & Explanation Answer: C) 480 m

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Filed Under: Problems on Trains
Exam Prep: Bank Exams

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Q:

There were 24 studentsina class. One of them, who was 18 years old, left the class and his place was filled up by a new comer.Ifthe average of the class was thereby lowered by 1 month, the age of new comer is-

A) 14 years	B) 15 years
C) 16 years	D) 17years

Answer & Explanation Answer: C) 16 years

Explanation:

Let the age of new comer be x

Avg age decrease by 1/12 year ⇒24 X 1/12 = 18 –x

⇒x=16 years

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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

If 2 shirts are offered free on purchase of 3 shirts priced Rs 600 each, then what will be the effective discount on each shirt?

A) 30 percent	B) 66.67 percent
C) 40 percent	D) 25 percent

Answer & Explanation Answer: C) 40 percent

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

The HCF of two numbers is 12 and their LCM is 72. If one of the two numbers is 24, then the other number is

A) 60	B) 36
C) 72	D) 48

Quantitative Aptitude - Arithmetic Ability Questions

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