buckkitty wrote:

What is the sum of 5 evenly spaced integers?

1. The middle integer is zero.

2. Exactly 2 of the integers are negative.

I don't understand why the OA in the book is right. Pls explain your answers when responding. thank you.

From stmt 1 if middle int is zero, then the integers are even, and should be -4 -2 0 2 4. The sum is zero hence suff.

From stmt 2 let us assume the intergers are even then the seq should be -4 -2 0 2 4 suff. But if the seq is odd, then -3 -1 1 3 5 the sum is not zero.Hence stmt2 is insuff.

Hence A.