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Ravjot Singh

· started a discussion

· 1 Months ago

4 (Question: 189645.0 )

why 54 is included .it is not satisfying the statement.

Question:
How many 4's in the series are preceded by a prime number but not followed by a prime number?


4, 1, 4, 1, 5, 4, 2, 6, 4, 1 8, 3, 4, 9, 2, 4, 8, 3, 4, 8, 2, 8, 4, 5, 4, 8, 7, 4, 6, 4, 5, 4

Options:
A) 3
B) 4
C) 5
D) 6
Solution:
Ans: (d) 349, 248, 348, 548, 746 and 54

Knowledge Expert

· commented

· 1 Months ago

@PALLAVI Its not mentioned in the condition that it has to be followed by any number...........Thats it.......

PALLAVI

· commented

· 1 Months ago

This is wrong answer , 54 is preceded by a prime number but not followed by any number, hence how can we consider it?

amit chandel

· commented

· 1 Months ago

54 should not be included.... if you can include it, u can exclude it too.... answer must be C

Knowledge Expert

· commented

· 1 Months ago

@ABHISHEK PANDEY Hi Abhishek please read the question carefully Q is: How many 4's in the series are preceded by a prime number but not followed by a prime number....

In 54, 4 is preceded by 5 which is a prime number, obviously there is no number/prime number after 4., so 54 also be counted.

ABHISHEK PANDEY

· commented

· 1 Months ago

knowledge expert is 4 a prime no.????? 54 is the incorrect addition to the solution..answermust be 5

Knowledge Expert

· commented

· 1 Months ago

why not?? 54 preceded by a prime number but not followed by a prime number
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