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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

A student multiplied a number by 4/5 instead of 5/4. What is the percentage error in the calculation?

A) 56.25 percent B) 18 percent
C) 28.13 percent D) 36 percent
 
Answer & Explanation Answer: D) 36 percent

Explanation:
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Filed Under: Percentage
Exam Prep: AIEEE , Bank Exams , CAT

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Q:

A, B and C can complete a work in 10, 12 and 15 days respectively. All three of them starts together but after 2 days A leaves the job and B left the job 3 days before the work was completed. C completed the remaining work alone. In how many days was the total work completed?

A) 5 B) 6
C) 7 D) 8
 
Answer & Explanation Answer: C) 7

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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

Two shirts are bought at the rate of Rs 400 each. Shopkeeper sells one at the profit of 150% and other at the loss of 150%. What will be the total profit or loss in the whole transaction?

A) Loss of Rs 50 B) No profit/loss
C) Profit of Rs 25 D) Loss of Rs 150
 
Answer & Explanation Answer: B) No profit/loss

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

4 2742
Q:

What is the HCF (highest common factor) of 133 and 112?

A) 15 B) 7
C) 19 D) 6
 
Answer & Explanation Answer: B) 7

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Filed Under: HCF and LCM
Exam Prep: Bank Exams

9 2738
Q:

Find the least common multiple of 15 and 12?

A) 3 B) 12
C) 30 D) 60
 
Answer & Explanation Answer: D) 60

Explanation:

The least common multiple of 12 and 15 is

12 = 2 x 2 x 3

15 = 3 x 5

 

LCM of 12 and 15 is  2 x 2 x 3 x 5 = 60.

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Filed Under: HCF and LCM
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

11 2732
Q:

A water tank has holes. The 1st hole alone empties the tank in 9 min and 2nd hole alone empties the tank in 6 min. If water leaks out at a constant rate, how many min does it take if both the holes together empty the tank?

A) 3 3/5 B) 3/5
C) 3 1/5 D) 3 2/5
 
Answer & Explanation Answer: A) 3 3/5

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Filed Under: Pipes and Cistern
Exam Prep: Bank Exams

14 2730
Q:

A thief drives his motor cycle at a speed of x kmph. The Policemen started chasing him in a jeep after 4 hrs and catches in 4 hrs. If the speed of jeep of policemen is 40 kmph, then calculate the speed of thief's motorcycle in kmph?

A) 30 B) 36
C) 45 D) 20
 
Answer & Explanation Answer: D) 20

Explanation:

Given that, speed of thief motorcycle is x kmph .

 

Given that, policemen started chasing him after 4 hours and catches him in 4 hours.

Distance travelled by the thief in 4 + 4 = 8 hours is d = s t 

=> d = 8x kms

 

Distance covered by the police in 4 hours is

D = 4 x 40 = 160 kms

 

To catch the thief, distance covered by the thief is equal to distance covered by the police .

 

Therefore,

d = D

 

d = 8x = 160 

x = 160/8 = 20

x = 20 kmph

 

Hence, the speed of thief's motorcycle is 20 km/hr.

 

 

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

A shopkeeper by selling 17 Omega watches, earns a profit equal to the selling price of 7 Omega watches. What is his profit percentage?

A) 41.1 percent B) 82.2 percent
C) 70 percent D) 12.2 percent
 
Answer & Explanation Answer: C) 70 percent

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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