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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

If k : l = 4 : 3 and l : m = 5 : 3, then find k : l : m ?

A) 18 : 24 : 11 B) 9 : 15 : 1
C) 20 : 15 : 9 D) 21 : 7 : 3
 
Answer & Explanation Answer: C) 20 : 15 : 9

Explanation:

Given k : l = 4 : 3
l : m = 5 : 3

Then k : l : m = 20 : 15 : 9

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Filed Under: Ratios and Proportions
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12 11278
Q:

Sonika invested an amount of Rs.5800 for 2 years. At what rate of compound interest will she get an amount of Rs.594.50 at the end of 2 years ?

A) 6.5% B) 6%
C) 5% D) 4.5%
 
Answer & Explanation Answer: C) 5%

Explanation:

C.I = P1+r100t-1

 

594.5 = 58001+r1002-1

 594.55800+1=1+r1002

 

r100=1.05-1=0.05=> r = 5 % .

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Filed Under: Compound Interest
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13 11274
Q:

Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of Interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest?

A) 3.6 B) 6
C) 18 D) cannot be determined
 
Answer & Explanation Answer: B) 6

Explanation:

Let rate = R% and time = R years.

 

Then, 1200×R×R100=432

 12R2=432

 

=> R = 6.

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Filed Under: Simple Interest
Exam Prep: GRE
Job Role: Bank PO

6 11271
Q:

A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number ? 

A) 2 B) 4
C) 6 D) 8
 
Answer & Explanation Answer: D) 8

Explanation:

Let the number be v. Then, 3 (2x + 9) = 75.

 2x + 9 = 25

=> 2x = 16

=> x = 8

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Filed Under: Problems on Numbers

3 11266
Q:

An error of 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is

A) 4.04% B) 5.04%
C) 6.04% D) 7.04%
 
Answer & Explanation Answer: A) 4.04%

Explanation:

100 cm is read as 102 cm

 

a = 100 x 100 sq.cm and b = 102 x 102 sq.cm

 

then, Increase in area = [ (102 x 102) - (100 x 100) ] sq.cm

 

percentage error =404100*100*100= 4.04%

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

3 11248
Q:

What will be the day of the week 15th August, 2010?

A) Sunday B) Monday
C) Tuesday D) Friday
 
Answer & Explanation Answer: A) Sunday

Explanation:

ke

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Filed Under: Calendar

18 11242
Q:

If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in sq.cm) is ?

A) 100 π B) 101/π
C) 99 π/12 D) 54/13π
 
Answer & Explanation Answer: A) 100 π

Explanation:

4/3 π x 10 x 10 x 10 = 8 x 4/3 π x r x r x r
r = 5
4π x 5 x 5 = 100π

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Filed Under: Volume and Surface Area
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17 11214
Q:

An automobile financier claims to be lending money at simple interest, but he includesthe interest every six months for calculating the principal. If he is charging an interest of10%, the effective rate of interest becomes:

A) 10% B) 10.25%
C) 10.5% D) none of these
 
Answer & Explanation Answer: B) 10.25%

Explanation:

Let the sum be Rs. 100. Then,

S.I. for first 6 months = Rs.[ (100 x 10 x 1)/(100 x 2) ]= Rs.5

S.I. for last 6 months =Rs.[(102 x 10 x 1)/(100 x 2) ] = Rs.5.25

So, amount at the end of 1 year = Rs. (100 + 5 + 5.25) = Rs. 110.25

Effective rate = (110.25 - 100) = 10.25%

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Filed Under: Simple Interest
Exam Prep: GRE

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