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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

What is the percentage decrease in the area of a triangle if its each side is halved?

A) 75% B) 50%
C) 25% D) No change
 
Answer & Explanation Answer: A) 75%

Explanation:
Area of triangle of = ½*a*b* sinθ = A
Where a and b are sides of the triangle and θ be the angle between them
After decreasing each side
New area = ½*(a/2)*(b/2)*sinθ = ¼ A
%decrease = [(A–¼ A)/A ]*100 = 75%
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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

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Q:

If (1 + cosA)/2 = x, then the value of x is

A) sin(A/2) B) √sin(A/2)
C) √cos(A/2) D) cos2(A/2)
 
Answer & Explanation Answer: D) cos2(A/2)

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

The area of a circular cricket ground is 24.64 hectares. Find the cost of making rope boundary at the rate of Rs. 5.40 per metre.

A) Rs. 9,600 B) Rs. 9,504
C) Rs. 9,802 D) Rs. 9,876
 
Answer & Explanation Answer: B) Rs. 9,504

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

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Q:

What least number must be added to 1039, so that the sum obtained is completely divisible by 29?

A) 4 B) 5
C) 8 D) 6
 
Answer & Explanation Answer: B) 5

Explanation:
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Filed Under: Problems on Numbers

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Q:

If 1 shirt is offered free on purchase of 4 shirts, what is the effective discount (in %) on each shirt?

A) 25 B) 20
C) 16 D) 24
 
Answer & Explanation Answer: B) 20

Explanation:
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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

Excluding stoppages, the speed of a bus is 80 kmph and including stoppages, it is 60 kmph. For how many minutes does the bus stop per hour?

A) 12 B) 15
C) 18 D) 20
 
Answer & Explanation Answer: B) 15

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

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Q:

If a merchant offers a discount of 30% on the list price, then he makes a loss of 16%. What % profit or % loss will he make if he sells at a discount of 20% of the list price?

A) 14 percent profit B) 4 percent loss
C) 26 percent profit D) 8 percent profit
 
Answer & Explanation Answer: B) 4 percent loss

Explanation:
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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

$32000 is invested at 10% for 2 years.Find the interest compounded Yearly

A) 4720 B) 5720
C) 6720 D) 7720
 
Answer & Explanation Answer: C) 6720

Explanation:

M=P(1+i)^n

 

I=M-P

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
Job Role: Bank PO

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