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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

The compound interest on rs.30000 at 7% per annum is Rs.4347. The period is

A) 2 years B) 2.5 years
C) 3 years D) 4 years
 
Answer & Explanation Answer: A) 2 years

Explanation:

Amount = Rs.(30000+4347) = Rs.34347

 

let the time be n years

 

Then,30000(1+7/100)^n = 34347

 

(107/100)^n = 34347/30000 = 11449/10000 = (107/100)^2

 

n = 2years

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Filed Under: Compound Interest
Exam Prep: GRE

394 97522
Q:

A can do a piece of work in 10 days, B in 15 days. They work together for 5 days, the rest of the work is finished by C in two more days. If they get Rs. 3000 as wages for the whole work, what are the daily wages of A, B and C respectively (in Rs):

A) 200, 250, 300 B) 300, 200, 250
C) 200, 300, 400 D) None of these
 
Answer & Explanation Answer: B) 300, 200, 250

Explanation:

A's 5 days work = 50%  

B's 5 days work = 33.33% 

C's 2 days work = 16.66%     [100- (50+33.33)] 

Ratio of contribution of work of A, B and C = 50 : 3313 : 1623 = 3 : 2 : 1   

A's total share = Rs. 1500 

B's total share = Rs. 1000 

C's total share = Rs. 500  

 

A's one day's earning = Rs.300  

B's one day's earning = Rs.200  

C's one day's earning = Rs.250

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Filed Under: Time and Work
Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk

598 97312
Q:

If 3x2 + kx + k = 0 has no solution, then the value of k will satisfy

 

A) k > -12 B) k > 12
C) k < 12 D) 0 < k < 12
 
Answer & Explanation Answer: D) 0 < k < 12

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 96599
Q:

Find the dividend if the divisor is (x+2), quotient is (4x-5) and the remainder is 12.

 

A) 4x2+5x+2 B) 4x2+3x+2
C) 4x2-3x+2 D) 4x2+3x-2
 
Answer & Explanation Answer: B) 4x2+3x+2

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 96362
Q:

ΔXYZ is right angled at Y. If m∠Z = 30°, then find the value of (sinX - 3/√2).

 

A) (√6-6)/2√2 B) (√2-√3)/√6
C) -1/2 D) (1-2√3)/2
 
Answer & Explanation Answer: A) (√6-6)/2√2

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 96351
Q:

Find the odd one out of the following number series?

9 5 6 14 56 488

A) 56 B) 6
C) 14 D) 5
 
Answer & Explanation Answer: A) 56

Explanation:

The given number series follows a pattern that,

9

9 x 0.5 + 0.5 = 5

5 x 1 + 1 = 6

6 x 2 + 2 = 14

14 x 4 + 4 = 60 (not equals to 56)

60 x 8 + 8 = 488.

 

Hence, the odd one in the given number series is 56.

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
Job Role: Analyst , Bank Clerk , Bank PO , Database Administration , IT Trainer

4 96184
Q:

If the circumference of a circle is 22 cm, then what must be its area (in cm²)?

 

A) 77 B) 38.5
C) 31.5 D) 63
 
Answer & Explanation Answer: B) 38.5

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

3 95857
Q:

What value will come in place of question mark (?) in following number series?

12, 16, 32, 68, ?

A) 198 B) 164
C) 132 D) 118
 
Answer & Explanation Answer: C) 132

Explanation:

Given series is 

 

12        16         32          68         ?

 

Here it follows a pattern that,

 

12

 

12 + (2x2) = 16

 

16 + (4x4) = 32

 

32 + (6x6) = 68

 

68 + (8x8) = 132

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Filed Under: Odd Man Out
Exam Prep: GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

7 95795