13. The sum of 10 distinct positive integers is 100 . What is the largest possible value of any of the 10 integers?
A 55
В 56
С 60
D 65
E 91
13. A To have one of the integers in the sum as large as possible, the other nine must be as small as possible. The minimum possible sum of nine distinct positive integers is $1+2+3+4+5+6+7+8+9=45$. Hence the largest possible integer in the sum is $100-45=55$.