Quantitative Aptitude - Arithmetic Ability Questions

Q:

Three consecutive integers form the lengths of a right-angled triangle. How many sets of such three consecutive integers is/are possible?

A) Only one B) Only two
C) Only three D) Infinitely many
 
Answer & Explanation Answer: A) Only one

Explanation:

let n-1, n, n+1 be 3 consecutive integers

So

(n+1)^2= n^2+ (n-1)^2

(n+1)^2-(n-1)^2= n^2

4n = n^2

So n = 0 or n = 4

n can’t be 0 as n-1 will be negative then

So 3,4 and 5 is the only triplet formed.

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

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Q:

One-third of Poojitha's age three years ago plus one-half of her age two years from now is twenty years. How old is she now?

 

A) 26 yrs B) 25 yrs
C) 23 yrs D) 24 yrs
 
Answer & Explanation Answer: D) 24 yrs

Explanation:
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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

If the measures of the angles of a triangle are in the ratio. 1:2:3 and if the length of the smallest side of the triangle is 10cm, then the length of the longest side is

A) 20cm B) 22cm
C) 24cm D) 18cm
 
Answer & Explanation Answer: A) 20cm

Explanation:
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Q:

Working 5 hours a day, Shivam can read a book in 24 days. How many hours a day should he work so as to finish the same work in 8 days?

A) 12 B) 18
C) 15 D) 21
 
Answer & Explanation Answer: C) 15

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

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Q:

Find the degree of the polynomial 8x4 + 2x2y3 + 4

A) 4 B) 5
C) 0 D) 1
 
Answer & Explanation Answer: B) 5

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

Reflection of the point (-3,6) in the x-axis is

A) (3,6) B) (6,-3)
C) (-3,-6) D) (-6,3)
 
Answer & Explanation Answer: C) (-3,-6)

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If compound interest received on a certain amount in the 3rd year is Rs. 1,240, what will be the compound interest (in Rs) for the 4th year on the same amount at 9% rate of interest?

A) 1245.6 B) 1521.6
C) 1351.6 D) 1220.6
 
Answer & Explanation Answer: C) 1351.6

Explanation:
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Filed Under: Compound Interest
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Q:

The distance between the centres of two circles is 61 cm and their radii are 35 cm and 24 cm. What is the length (in cm) of the direct common tangent to the circles?

A) 60 B) 54
C) 48 D) 72
 
Answer & Explanation Answer: A) 60

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

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