In the repeating decimal 0.714285714285…,5 is the 6 th, 12th, 18th, 24th, 30th, 36th, 42 nd, and 48 th digit. 7 is the 49 th digit and 1 is the 50 th digit.
You might also realize that there are 6 digits that repeat, divide 50 by 6 , and get a remainder of 2 . Therefore the 2 nd of the 6 digits that repeat, which is 1 , will be the 50 th digit.