Questions of Basic Math with Solutions

1) If x and y are positive integers and x + y = 5, then a possible value for 2x - y is a) 3 b) -3 c) 2 d) -2 e) 0 2) Let a, b, and c, be positive prime integers such that a+b=c. What is the sum of the three smallest possible values of c? a) 10 b) 25 c) 31 d) 39 e) 40