Quantitative Aptitude - Arithmetic Ability Questions

Q:

If 3x= 4y= 12, then z is equal to

A) xy B) x + y
C) xy/x+Y D) 4x +3y
 
Answer & Explanation Answer: C) xy/x+Y

Explanation:
Taking log of all 3 we get
xln3 = yln4 =
zln12 = k
z = k/ln12 = k / ln(
3*4) = k/ln3 + ln4 = k / (k/x +k/y) = xy / (x+y)
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Filed Under: Simplification
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Q:

If x - 1/x = 1 then what is the value of 1x1x-1-1x+1+1x2+1-1x2-1?

A) ±√5 B) 2/5
C) ±2/√5 D) ±√5/2
 
Answer & Explanation Answer: C) ±2/√5

Explanation:
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Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) 81 B) 125
C) 64 D) 198
 
Answer & Explanation Answer: D) 198

Explanation:
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Q:

A Bus travels at the speed of 36 km/hr, then the distance covered by it in one second is

A) 10 m B) 15 m
C) 12.5 m D) 13.5 m
 
Answer & Explanation Answer: A) 10 m

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

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Q:

A home theatre set is Rs. 4950. If two successive discounts of 20% and 15% are given, then its selling price is

A) Rs.3366 B)  Rs.6633
C)  Rs.3636 D) Rs.6363
 
Answer & Explanation Answer: A) Rs.3366

Explanation:
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Filed Under: Profit and Loss
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Q:

In what time will a train, 60 metres long, running at the rate of 36 km/hr pass a telegraph post?

A) 9 seconds B) 8 seconds
C) 7 seconds D) 6 seconds
 
Answer & Explanation Answer: D) 6 seconds

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

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Q:

If a number is decreased by 10%, it becomes 54. To make it 72, it should be increased by

A) 21% B) 18%
C) 200/9% D) 20%
 
Answer & Explanation Answer: D) 20%

Explanation:
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Filed Under: Percentage
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Q:

If x3 = 62 - 32, then the value of x is

A) 9 B) 6
C) 3 D) 1
 
Answer & Explanation Answer: C) 3

Explanation:
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