Question

Which natural numbers have no predecessor

• A. $0$
• B. $1$
• C. $10$
• D. $100$

Answer 1

The correct option is B

$1$

Successor and predecessor

Predecessor and Successor are the two terms in mathematics most commonly used for the series and sequence of whole numbers. A predecessor is known as before numbers, and a successor is known as after numbers.

• Successor – Successor, is the term that comes right after a particular number term, or a value. Suppose n is a whole number, then the successor of $n$ is $n+1$. The other terminologies used for a successor are next value.
• Predecessor – A predecessor is a value that comes right before a particular value. Suppose a value is $x$, then the predecessor of $x$will be $x–1$. Thus, to find the predecessor of any value we have to subtract the given value from $1$.

Explanation

A number that comes before the given number is recognized as a predecessor. The predecessor of the natural number $1$ is the whole number $0$. It is true that one does not have any predecessor, which is a natural number.

Hence, $1$ is the natural number that has no predecessor.