Quantitative Aptitude - Arithmetic Ability Questions

Q:

A person goes from point N to P and comes back. His average speed for the whole journey is 60 km/hr. If his speed while going from N to P is 40 km/hr, then what will be the speed of the person (in km/hr) while coming back from P to N?

A) 80 B) 100
C) 120 D) 140
 
Answer & Explanation Answer: C) 120

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

A boy crosses a 300 metres wide road in 30 seconds. What is his speed (in km/hr)?

A) 18 B) 54
C) 36 D) 27
 
Answer & Explanation Answer: C) 36

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

Praneet started his journey at 2:45:46 p.m. and reached the destination at 4:55:57 p.m. Anit started the journey 58 mins 40 secs after Praneet and reached his destination 50 mins 29 secs after him. How long did Anit take to complete his journey?

 

A) 2 hours 2 seconds B) 2 hours 2 minutes
C) 1 hour 59 minutes D) 2 hours 1 minute 12 seconds
 
Answer & Explanation Answer: D) 2 hours 1 minute 12 seconds

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Filed Under: Time and Distance
Exam Prep: Bank Exams , CAT

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Q:

On a ground , there is a vertical tower with a flagpole on its top . At a point 9 m away from the foot of the tower , the angles of elevation of the top and bottom of the flagpole are 60° and 30° respectively . The height of the flagpole is

A) 5√3 m B) 6√3 m
C) 6√2m D) 6√5 m
 
Answer & Explanation Answer: B) 6√3 m

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Filed Under: Height and Distance
Exam Prep: Bank Exams

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Q:

Find  two  natural  numbers  whose  sum  is  85 andtheleast common multiple is 102.

A) 30 & 55 B) 17 & 68
C) 35& 55 D) 51 & 34
 
Answer & Explanation Answer: D) 51 & 34

Explanation:

Let a + b = 85→b = 85 –a

LCM(a,b) =102→ab = 102

k→a(85 –a) = 102k, where k is a natural number.

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Filed Under: Numbers
Exam Prep: Bank Exams

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Q:

If the difference between the roots of the equation Ax2  Bx + C = 0 is 4, then which of the following is TRUE?

A) B2 – 16A2 = 4AC + 4B2 B) B2 – 10A2 = 4AC + 6A2
C) B2 – 8A2 = 4AC + 10A2 D) B2 – 16A2 = 4AC + 8B2
 
Answer & Explanation Answer: B) B2 – 10A2 = 4AC + 6A2

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

26% of a number is 65. What is the number?

A) 50 B) 250
C) 260 D) 40
 
Answer & Explanation Answer: B) 250

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

What is the HCF of 36, 72 and 126?

A) 9 B) 36
C) 18 D) 12
 
Answer & Explanation Answer: C) 18

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Filed Under: HCF and LCM
Exam Prep: Bank Exams

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