KVPY SA Exam 19-Nov-2017 Question Paper

If the prime factorization of the denominator n has only factors of 2 and factors of 5, the decimal expression terminates. If there is any prime factor in the denominator other than 2 or 5, then the decimal expression repeats.
The numbers are 2, 4, 8, 16, 32, 64, 128, 5, 25, 125,10, 20, 40, 50, 80, 100, 160, 200