Question

Find the missing term. 11/19, 17/29, 23/37, 31/43, ?

Answer 1

the missing term is 41/53. 

If you observe the number pattern, then it can be seen that numerators and denominator are arranged with prime numbers which are alternate in position.

For example 11/19 and 17/29

Between 11 and 17, 13 is the only prime number. Between 19 and 29 , 23 is the only prime number.

Between 17/29 and 23/37, 19 and 31 are prime number. So continuing with this pattern next number in the series is 41/53.