Form the biconditional statement `p hArr` q`, given,
p: The unit digits of an interger is zero.
q: It is divisible by 5.

Answer

To form the biconditional statement \( p \iff q \), we need to analyze the given propositions:

- \( p \): The unit digit of an integer is zero.
- \( q \): It is divisible by 5.

### Step-by-Step Solution:

1. **Understanding Biconditional Statements**: A biconditional statement \( p \iff q \) means that both \( p \) and \( q \) are true at the same time or both are false at the same time. It can be read as "p if and only if q".

2. **Expressing the Statements**:
- We start by expressing the two propositions clearly:
- \( p \): "The unit digit of an integer is 0."
- \( q \): "The integer is divisible by 5."

3. **Forming the Biconditional Statement**:
- To form the biconditional statement, we combine both propositions:
- The biconditional statement can be written as:
\[ p \iff q \]
- This translates to:
"The unit digit of an integer is 0 if and only if it is divisible by 5."

4. **Final Statement**:
- Therefore, the final biconditional statement is:
\[ \text{The unit digit of an integer is 0 if and only if it is divisible by 5.} \]