Quantitative Aptitude - Arithmetic Ability Questions

Q:

If a boat goes upstream at a speed of 21 km/h and comes back the same distance at 28 km/h. What is the average speed (in km/hr) for the total journey?

A) 24.5 B) 24
C) 25 D) 25.4
 
Answer & Explanation Answer: B) 24

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

Find the unit place digit in 71 x 72 x 73 x 74 x 76 x 77 x 78 x 79.

A) 2 B) 0
C) 4 D) 6
 
Answer & Explanation Answer: D) 6

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

x and y are two numbers such that their mean proportion is 16 and third proportion is 128. What is the value of x and y?

A) 8 and 16 B) 16 and 32
C) 8 and 32 D) 16 and 16
 
Answer & Explanation Answer: C) 8 and 32

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

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Q:

Select the related number from the given alternatives.
0.02 : 0.002 :: 1/3 : ?

A) 0.333 B) 1/30
C) 0.003 D) 3
 
Answer & Explanation Answer: B) 1/30

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

If the selling price is Rs 728 after getting a discount of 9%, what was the marked price?

A) Rs 793.52 B) Rs 800
C) Rs 662.48 D) Rs 667
 
Answer & Explanation Answer: B) Rs 800

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

The length and breadth of a rectangle is in the ratio of 3 : 1. If its perimeter is 96 m, then what is the length of the rectangle?

A) 36m B) 24m
C) 12m D) 48m
 
Answer & Explanation Answer: A) 36m

Explanation:

Let the length of the rectangle be 3x and breadth be 1x
Given, perimeter = 96 m
2(l + b) = 96 (or) l + b = 48 (or) 3x + 1x = 48 (or) x = 12 m
Now, Length of the rectangle = 12 x 3 = 36 m

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Filed Under: Area
Exam Prep: AIEEE , Bank Exams , CAT

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Q:

What is the length of the side of an equilateral triangle, if its area is 64√3 sq cm?

A) 8 cm B) 16 cm
C) 16√3 cm D) 8√3 cm
 
Answer & Explanation Answer: B) 16 cm

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Filed Under: Area
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 AE are 8 cm, 4 cm and 12 cm respectively, what is the length of AC?

A) 6 cm B) 18 cm
C) 9 cm D) 15 cm
 
Answer & Explanation Answer: B) 18 cm

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Filed Under: Area
Exam Prep: Bank Exams

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