Latest Exam Aptitude Question SOLUTION: 2,3,5,11,23,29,41,53,83,89,_

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(#M40153972) EXAM Numerical Ability question series Keep an EYE

2,3,5,11,23,29,41,53,83,89,_

Asked In Exam D.RAVIKIRAN (8 years ago)

Unsolved Read Solution (2)

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sanjay shah  (8 years ago)

solution :- All are prime number.
so, this is series of prime number only..

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ajay kumar  (6 years ago)

It is a famous series called as the SOPHIE GERMAIN PRIMES , the idea is that the prime number n will exist in the series if and only if the number 2n+1 is also prime.

Ex-2 will exist because 2*2+1=5,which is prime

Ex-3 will also exist because 3*2+1=7 which is also prime BUT,

Ex- 7 will not exist because 7*2+1=15 ,which is not prime .

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