Match with Regex any number except a specific number <p>Using regex I would like to match strings like:</p> <ul> <li>3.2 Title 1</li> <li>3.5 Title 2</li> <li>3.10 Title 3</li> </ul> <p>I did <code>@"^3\.\d+[ ]."</code> But I would like to do not match strings of "3." followed by a single 1 like :</p> <ul> <li>3.1 Title 4</li> </ul> <p>I tried <code>@"^3\.[^1][ ]."</code> but it doesnt match strings like 3.10 </p> <p>So How can I match any numbers except the number 1?</p> <p>Thank you in advance </p>