Quantitative Aptitude - Arithmetic Ability Questions

Q:

If x + y = 13 and x2 + y2 = 89, then find xy is

A) 80 B) 169
C) 258 D) 40
 
Answer & Explanation Answer: D) 40

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

In each of the following questions, a question is followed by information given in them Statements I, II and III. You have to study the question along with the statements and decide the information given in which or the statements/ is necessary to answer the question. 

What is the cost of flooring the rectangular hall?

I. Length and the breadth of the hall are in the ratio of 3:2

II. Length of the hall is 48 m and cost of flooring is ₹ 850 Per sq.m.

III. Perimeter of the hall is 160 m and cost of flooring is ₹ 850 per sq m

A) I and II B) I and III
C) Only III D) I and either II or III
 
Answer & Explanation Answer:

Explanation:

From I and II,
Length = 3x = 48 m
∴ x = 16
Breath = 2x = 32 m
Hence, Area of floor = 48 × 32
Cost of flooring = 48 × 32 × 850 = ₹ 1305600
From I and III, 2(l +b) = 160
2(3x + 2x) = 160
10x = 160
∴ x = 16
∴ Length = 3 × 16 = 48 m
Breadth = 2x = 32m
Cost of flooring = (48 × 32) × 850 = ₹ 1305600
Similarly, from II and III, we can find
l = 48 m
b = 32 m
and Total cost of flooring = ₹ 1305600

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Q:

Three numbers are in the ratio 1 : 2 : 3 and the sum of their cubes is 4500 .The smallest numbers is

A) 4 B) 5
C) 6 D) 10
 
Answer & Explanation Answer: B) 5

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

Working 7 hours in a day, 4 men can do a piece of work in 8 days. Working 8 hours in a day, the required number of men to perform the same work in 4 days will be

A) 8 B) 4
C) 7 D) 9
 
Answer & Explanation Answer: C) 7

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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

The length, breadth and height of a cuboid are in the ratio 19 : 11 : 13. If length is 30 cm more than height, then what is the volume (in cub.cm) of this cuboid?

A) 81510 B) 89665
C) 195300 D) 339625
 
Answer & Explanation Answer: D) 339625

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

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Q:

The age of Rakhi is twelve times that of her daughter Anubha. If age of Anubha is 3 years now, then what was the age of Rakhi, 2 years earlier?

A) 20 years B) 34 years
C) 30 years D) 36 years
 
Answer & Explanation Answer: B) 34 years

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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

The average age of eight teachers in a school is 40 years. A teacher among them died at the age of 55 years whereas another teacher whose age was 39 years joins them. The average age of the teachers in the school now is (in years)

A) 35 B) 36
C) 38 D) 39
 
Answer & Explanation Answer: C) 38

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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

The sum of two angles of a triangle is 116o and their difference is 24o . The measure of smallest angle of the triangle is

A) 38° B) 28°
C) 46° D) 64°
 
Answer & Explanation Answer: C) 46°

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