Quantitative Aptitude - Arithmetic Ability Questions

Q:

P and Q can complete a task in 50 and 20 days respectively. In how many days can they complete 70% of the task if they work together?

A) 20 days B) 20 days
C) 40 days D) 10 days
 
Answer & Explanation Answer: D) 10 days

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

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Q:

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

A) 7 B) 3.5
C) 5 D) 7.5
 
Answer & Explanation Answer: D) 7.5

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Filed Under: Time and Work
Exam Prep: Bank Exams

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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
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Q:

What is the area (in sq cm) of a rhombus if the lengths of its diagonals are 25 cm and 20 cm?

A) 500 B) 250
C) 125 D) 200
 
Answer & Explanation Answer: B) 250

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

ax + 3y = 6 has slope -2/3. What is the value of a?

A) -2 B) 2
C) 3 D) -3
 
Answer & Explanation Answer: B) 2

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If a2+b2c2 = b2+c2a2 = c2+a2b2 = 1k k0 then k =

A) 2 B) 1
C) 0 D) 1/2
 
Answer & Explanation Answer: D) 1/2

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Filed Under: Simplification
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Q:

If a - b = 2 and ab = 15, then what is the value of a3- b3?

A) 152 B) 112
C) 108 D) 98
 
Answer & Explanation Answer: D) 98

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Q:

The incomes of S and T are in the ratio 3 : 4 and their expenditures are in the ratio 1 : 1. If S saves Rs 4000 and T saves Rs 22000, then what will be the income (in Rs) of S?

 

A) 45000 B) 54000
C) 60000   D) 65000
 
Answer & Explanation Answer: B) 54000

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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