This question already has an answer here:
If there is a prime number x, if we reciprocate it we will get 1/x.
Reciprocal of prime number will be a rational number , Except 1/2 and 1/5 , every number which is reciprocal of prime number is a recurring non terminating decimal number.
Question- How to find that after how many digit recurring numbers will repeat ? How to find the recurring numbers?