What is the difference between the successor and predecessor of 3?
2
The successor of a number is one more than that number.
So, the successor of 3 = 3 + 1 = 4.
The predecessor of a number is one less than that number.
So, the predecessor of 3 = 3 - 1 = 2.
∴ The difference between the successor and the predecessor of 3 = 4 - 2 = 2