- A 6-digit number starts from \(100000\) and goes up to \(999999\).
- The smallest 6-digit number is \(100000\).
- “Ending in 5” means the last digit should be \(5\).
- To change \(100000\) so it ends with \(5\), add \(5\):
\(100000 + 5 = 100005\). - Check: \(100005\) has 6 digits and the last digit is \(5\). ✔️
Therefore, the smallest 6-digit number ending in 5 is \(100005\).