Question

The difference between successor and predecessor of any number is

• A. 0
• B. 1
• C. 2
• D. None of these

Answer 1

The correct option is C

2

Determine the difference between the successor and predecessor of a number.

Explanation for correct option:

Option (C) : 2

Assume that the number is $x$.

The successor of the number is $x+1$ and its predecessor is $x-1$.

Subtract the predecessor from the successor:

$\begin{array}{rcl}x+1-(x-1)& =& x+1-x+1\\ & \Rightarrow & x+1-(x-1)=2\end{array}$

So, the required difference is $2$.

Thus, option (C) is correct.

Explanation for incorrect options:

Since the difference between the successor and predecessor, that is $x+1\mathrm{and}x-1$, is $2$,

So, options (A), (B), and (D) are incorrect.

Thus, the only correct option is option (C).