Find the missing number in the sequence - 3 5/3 7/5 11/7 ? 17/11

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Find the missing number in the sequence - 3 5/3 7/5 11/7 ? 17/11
posted Jul 15, 2014

All numerator is a series of prime number
And denominator is a series of all odd numbers

And series will be 3 5/3 7/5 11/7 13/9 17/11

+1 vote

You see in all the cases you have only prime numbers are used
say your current number is a/b then next number is next prime after a/a

13 is the next prime number after 11
so missing number is 13/11

Sir as we see the denominator does not contain all the prime number
For first its 3/1   and 1 is not a prime number
so for a/b
a is all series of prime number
and b is all odd numbers