Are these correct? What do they mean? <br/><br/>1. How many kilometers <b>is</b> on this car? <br/>2. How many kilometers <b>are</b> on this car? <br/><br/>3. There <b>are</b> 27000 kilometers on this car. (This is correct? ) <br/>4. There <b>is</b> 27000 kilometers on this car. (This is incorrect? So #1 is incorrect?) <br/><br/>Thanks.