Quantitative Aptitude - Arithmetic Ability Questions

Q:

If a taxi going at 40 km/hr takes 25 minutes to travel a certain distance, by how much should it increase its speed (in km/hr) to travel the same distance in 20 minutes?

A) 50 B) 5
C) 25 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:
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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

A) 49/7 B) 19/7
C) 50/7 D) 18/7
 
Answer & Explanation Answer: D) 18/7

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Filed Under: Average
Exam Prep: Bank Exams

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Q:

The mean of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct mean is:

A) 39 B) 39.7
C) 40.3 D) 42.7
 
Answer & Explanation Answer: B) 39.7

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Filed Under: Average
Exam Prep: Bank Exams

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Q:

A vendor buys 12 bananas for Rs 60 and sells 5 bananas for Rs 32. What will be his gain (in %)?

A) 28 B) 32
C) 24 D) 22
 
Answer & Explanation Answer: A) 28

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

x and y are two numbers such that their mean proportion is 8 and third proportion is 512. What is the value of x and y?

A) 2 and 16 B) 2 and 32
C) 4 and 32 D) 4 and 16
 
Answer & Explanation Answer: B) 2 and 32

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams , CAT

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Q:

ΔABC is right angled at B. BD is the altitude. AD is 18 cm and DC is 50 cm. Find length of BD?

A) 30 cm B) 25 cm
C) 35 cm D) 15 cm
 
Answer & Explanation Answer: A) 30 cm

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

What should come in place of question mark (?) in the following question? (You do not have to calculate the exact value.)

(√80.997 - √25.001) × (√120.98 + √16.02) = ?

A) 20 B) 30
C) 40 D) 50
 
Answer & Explanation Answer:

Explanation:

Ans. 
Approximating the values:
(√81 - √25) × (√121 + √16) = ?
(9 - 5) × (11 + 4) = ?
4 × 15 = ?
? = 60

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , GATE

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Q:

Find the value of 200 x 20 x 2 x 0.2 x 0.02 x 0.002 = ?

A) 0.064 B) 0.64
C) 64 D) 640
 
Answer & Explanation Answer: A) 0.064

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Filed Under: Simplification
Exam Prep: Bank Exams

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