Aptitude and Reasoning Questions

Q:

The L.C.M of  22, 54, 108, 135 and 198 is

 

A) 330 B) 1980
C) 5940 D) 11880
 
Answer & Explanation Answer: C) 5940

Explanation:

 22 = 2 x 11

 54 = 2×33

108 = 22×33

135 = 33×5 

198 = 2×32×11

  L.C.M = 22×33×5×11=5940

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Filed Under: HCF and LCM

226 95004
Q:

Simplify the following equation.

1943 + 12 + 13 + 11 + 14

A) 43/19 B) 1
C) 38/19 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

After solving we get,

 

62/931.

 

None of the options satisfy.

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Filed Under: Simplification
Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk

23 94948
Q:

Find the wrong number in the given series.

8, 27, 125, 343, 1381

A) 27 B) 8
C) 343 D) 1381
 
Answer & Explanation Answer: D) 1381

Explanation:

Given series follows Cubes on Prime Numbers 

 

i.e 23, 33, 53,...but  93is 1331

 

so 1381 is wrong

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Filed Under: Number Series
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

154 94694
Q:

At what time between 4 and 5 o'clock will the hands of a watch point in opposite directions?

A) 54 past 4 B) (53 + 7/11) past 4
C) (54 + 8/11) past 4 D) (54 + 6/11) past 4
 
Answer & Explanation Answer: D) (54 + 6/11) past 4

Explanation:

4 o'clock, the hands of the watch are 20 min. spaces apart.
To be in opposite directions, they must be 30 min. spaces apart.
Minute hand will have to gain 50 min. spaces.
55 min. spaces are gained in 60 min 

 

50 min. spaces are gained in 6055×50 min. or 54611 

 

Required time = 54611 min. past 4.

 

 

 

 

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Filed Under: Clocks
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

325 94171
Q:

If South-East becomes North, North-East becomes West and so on. What will West become?

A) North-East B) North-West
C) South-East D) South-West
 
Answer & Explanation Answer: C) South-East

Explanation:

 

It is clear from the diagrams that new name of West will become South-East.

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Filed Under: Direction Sense Test

1586 93967
Q:

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning?

Answer

Let the average after 7th inning = x


Then average after 16th inning = x - 3


16(x-3)+87 = 17x 


 x = 87 - 48 = 39

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Subject: Average Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk

674 93834
Q:

In the following question, select the missing number from the given series.
 
102, 85, 68, 51, ?

A) 34 B) 40
C) 37 D) 31
 
Answer & Explanation Answer: A) 34

Explanation:
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Filed Under: Number Series

3 93829
Q:

What is the next number in this series ? 

4, 6, 12, 18, 30, 42, 60, ?

A) 71 B) 72
C) 73 D) 69
 
Answer & Explanation Answer: B) 72

Explanation:

With close observation, you will note that each number in the list is in the middle of two prime numbers. Thus:

4 is in the middle of 3 and 5, 6 is in the middle of 5 and 7, 12 is in the middle of 11 and 13, 18 is in the middle of 17 and 19, 30 is in the middle of 29 and 31. 42 is in the middle of 41 and 43, 60 is in the middle of 59 and 61.

Therefore, the next number would be the one that is in the middle of the next two prime numbers, which is 72 (which is in the middle of 71 and 73).

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

10 92999