6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Vikram and Vivek can finish a work in 50 days. They worked together for 20 days and then left. How much work has been done by them?

A) 3/5	B) 1/3
C) 1/2	D) 2/5

Answer & Explanation Answer: D) 2/5

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

5 1673

Q:

Car B is running twice as fast as car A. If car A covers a distance of 90 km in 1 1/2 hrs, what is the speed of car B?

A) 60 kmph	B) 90 kmph
C) 100 kmph	D) 120 kmph

Answer & Explanation Answer: D) 120 kmph

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

What is the unit digit of the sum of first 111 whole numbers?

A) 4	B) 6
C) 5	D) 0

Answer & Explanation Answer: C) 5

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams , CAT

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Q:

Average of all even numbers between 104 and 148 is __________.

A) 128	B) 130
C) 124	D) 126

Answer & Explanation Answer: D) 126

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Filed Under: Average
Exam Prep: Bank Exams

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Q:

A boat travels 24 km upstream in 6 h and 20 km downstream in 4 h. then, the speed of a boat in still water and the speed of current are respectively

A) 4.5 km/h and 3 km/h	B) 4.5 km/h and 0.5 km/h
C) 4 km/h and 2 km/h 5 km/h and 2 km/h	D) 5 km/h and 2 km/h

Answer & Explanation Answer: B) 4.5 km/h and 0.5 km/h

Explanation:

Distance travelled by boat in upstream=24km

Time taken = 6 h

Speed of the boat in upstream = 24/6 = 4 km/h

And distance travelled by boat in downstream = 20 km

Time taken = 4h Speed of the boat in downstream = 20/4 km/h = 5 km/h

Now, speed of the boat in still water = 1/2 [ speed of the boat in upstream + speed of the boat in downstream] =1/2 [4 + 5] = 1/2 × 9 = 4.5 km/h

And speed of the current = 1⁄2 [speed of the boat in downstream – speed of the boat in upstream] = 1/2 [5 – 4] = 1/2 × 1 = 0.5 km/h

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

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Q:

The value of $\cos^{2} 20 ° + \cos^{2} 70 °$ is

A) 0	B) 1
C) 1/2	D) 13

Answer & Explanation Answer: B) 1

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

Two successive discounts of 10% and 20% are equivalent to a single discount of

A) 28%	B) 27%
C) 25%	D) 30%

Answer & Explanation Answer: A) 28%

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Filed Under: Percentage
Exam Prep: Bank Exams

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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))

Quantitative Aptitude - Arithmetic Ability Questions

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