Sum of positive integers x and y is 72. What is xy?
a. x = y + 1
b. x and y have same tens digit
a. x = y + 1
b. x and y have same tens digit
This problem is wrong.
Statement 1 doesn't make sense and let me explain why. x and y are both positive integers and it says there that x = y + 1. Since x + y = 72, then it's safe to say that y + 1 + y = 2y + 1 = 72. This means that 2y = 71, with y = 35.5. As you can see, 35.5 is NOT a positive integer. This contradicts the initial assumption.
