Hello,<br/><br/>I <b>have no</b> idea. ( I <b>don't have</b> any idea.)<br/><br/>We <b>have no</b> common answer. (We <b>don't have</b> common answer.)<br/><br/>I <b>have no</b> money. (I <b>don't have</b> money.)<br/><br/> Is <b>"have no"</b> informal english? or both are acceptable?<br/><br/>If i change "have no" to question are these correct?<br/><br/>I have no idea. <b>Have I no idea?</b><br/><br/>We have no common answer. <b>Have we no common answer?</b><br/><br/>Thank you very much.