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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

A, B and C can do a job working alone in 6, 9 and 18 days respectively. They all work together for 1 day, then A and B quit. How many days C working alone will take to complete the remainder of the job?

A) 9 B) 6
C) 12 D) 10
 
Answer & Explanation Answer: C) 12

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Filed Under: Time and Work
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Q:

What is the area (in sq cm) of a rectangle of perimeter 48 cm and breadth 10 cm?

A) 140 B) 480
C) 240 D) 440
 
Answer & Explanation Answer: A) 140

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Filed Under: Area
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Q:

If the angle of elevation of the sun decreases from 45° to 30°, then the length of the shadow of a pillar increases by 60m. The height of the pillar is

A) 60(√3+1) m B) 30(√3-1) m
C) 30(√3+1) m D) 60(√3-1) m
 
Answer & Explanation Answer: C) 30(√3+1) m

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Filed Under: Simplification
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Q:

If the angles of a triangle are in the ratio of 1 : 4 : 7, then find the ratio of the greatest angle to the smallest angle.

A) 7:2 B) 2:3
C) 7:1 D) 3:5
 
Answer & Explanation Answer: C) 7:1

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Filed Under: Ratios and Proportions
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Q:

What is the value of (3/5 + 7/9)?

A) 62/45 B) 31/28
C) 5/7 D) 1/7
 
Answer & Explanation Answer: A) 62/45

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Q:

What is the value of x4+y4 when the value of x3+y3=8 and x+y=2 ?

A) 2 B) 8
C) 16 D) 32
 
Answer & Explanation Answer: C) 16

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Q:

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is:-

A) 1:2  B) 2:3
C) 3:4 D) 3:5
 
Answer & Explanation Answer: B) 2:3

Explanation:

Let the ratio be x : y
Total boys = 16.4 X x
Total girls = 15.4 X y
Total number of students in class = 16.4x + 15.4y
The average age of all students is 15.8
The total age of boys is 15.8x
The total age of girls is 15.8y
16.4x + 15.4y = 15.8x + 15.8y
0.6 x = 0.4 y
x/y = 0.4/0.6 = 2/3

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Filed Under: Ratios and Proportions
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Q:

To cover a distance of 144 km in 3.2 hours what should be the average speed of the car in meters/second?

A) 12.5 B) 10
C) 7.5 D) 15
 
Answer & Explanation Answer: A) 12.5

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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