Task: Question Answering
Input (English): Problem: if # is an operation which results in adding the digits of integer until a single digit is left, what is the probability that a number picked up in first 90 positive integers will have the result of # as an odd digit ? ( example 99 = 9 + 9 = 18 = 1 + 8 = 9, so # = 9 )
Options: a. 4 / 10, b. 4 / 9, c. 1 / 2, d. 6 / 10, e. 5 / 9
Output (English): e