Question

The successor of -18 is
A. -19
B. 17
C. -17
D. 19

Answer 1

Hint: We know that the successor of a number is one more than a given number. So, to find the successor of -18 we add one to this and get the answer.

Complete step by step answer:
We have given a number -18.
We have to find the successor of that number.
Now, we know that the successor of a number is a number just after the given number. We can obtain the successor of a number by adding one to the given number. The successor of an integer is always an integer number.
Now, in order to find the successor of -18 we can add one.
Now, adding one to the -18 we get
 $ \begin{align}
  & \Rightarrow -18+1 \\
 & \Rightarrow -17 \\
\end{align} $
So we get a successor of -18 is -17.
Option C is the correct answer.

Note:
Alternatively one can draw the given number and its neighbors on the number line. The successor is the integer that is present right next to the given integer. Here in this question, the possibility of mistake is that students may choose -19 as the correct answer without solving. To solve this type of question students must know the difference between predecessor and successor of a number. A predecessor of a number is a number one less than a number. We can obtain the predecessor of a number by subtracting one from the given number.