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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Which of the following is not a prime number?

A) 5 B) 11
C) 21 D) 37
 
Answer & Explanation Answer: C) 21

Explanation:

A prime number is a whole number greater than 1 whose only factors are 1 and itself.

 

Factors of 5 are 1, 5

Factors of 11 are 1, 11

Factors of 21 are 1, 3, 7, 21

Factors of 37 are 1, 37.

 

Hence, according to the definition of a prime number, 21 is not a prime number as it has more than two factors.

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

6 3735
Q:

B starts 4 minutes after A from the same point, for a place at a distance of 7 miles from the starting point. A on reaching the destination turns back and walks a mile where he meets B. If A's speed is a mile in 8 minutes then B's speed is a mile in ____ minutes.

A) 9 B) 12
C) 10 D) 8
 
Answer & Explanation Answer: C) 10

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

8 3734
Q:

What are the 2 natural numbers, sum of whose squares is 52?

A) 2, 7 B) 3, 5
C) 4, 6 D) 5, 6
 
Answer & Explanation Answer: C) 4, 6

Explanation:
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Filed Under: Square Roots and Cube Roots
Exam Prep: Bank Exams

3 3731
Q:

 7, 16, 36, 78, 144, ?

which number come in place of question mark

A) 168 B) 196
C) 222 D) 256
 
Answer & Explanation Answer: C) 222

Explanation:
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Filed Under: Numbers
Exam Prep: Bank Exams
Job Role: Bank PO

43 3728
Q:

3 pipes when opened for 3 hours can fill 3 buckets. How many buckets can 2 pipes open for 2 hours approximately fill?

A) 2/3 buckets B) 2 buckets
C) 1 bucket D) 4/3 bucket
 
Answer & Explanation Answer: D) 4/3 bucket

Explanation:

2 pipes open for 2 hours will fill = (2/3) x (2/3) x 3 = 4/3 buckets

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Filed Under: Pipes and Cistern

9 3724
Q:

An inspector is 228 meter behind the thief. The inspectorruns 42 meters and the thief runs 30 meters in a minute. Inwhat time will the inspector catch the thief?

A) 19 minutes B) 20 minutes
C) 18 minutes D) 21 minutes
 
Answer & Explanation Answer: A) 19 minutes

Explanation:

Inspector s 228 meter behind the thief and now aftersome x distance he will catch the thief. So
x/30 = 228+x/42 => x = 570 m
(228 + 570) / 42 = 19 min

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Filed Under: Time and Distance
Exam Prep: Bank Exams

3 3718
Q:

A,B and C together can finish a task in 7.5 days. C is thrice as productive as A and B alone can do the task in 15 days. In how many days can A and C do the job if B goes on leave?

A) 30 B) 10
C) 20 D) 15
 
Answer & Explanation Answer: D) 15

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

11 3718
Q:

A clock gains 15 minutes per day. If it is set right at 12 noon, the time it shows at 4 AM is

A)  4.20 AM B)  4.30 AM
C) 4.02 AM D) 4.10 AM
 
Answer & Explanation Answer: D) 4.10 AM

Explanation:
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Filed Under: Clocks
Exam Prep: Bank Exams

16 3712