Hello,<br/><br/>I have a question regarding when to use single/plural in sentences, for example, the following ones below:<br/><br/>1. "password must be 8 charater long" or "password must be 8 characters long"<br/>Should it be "character" or "characters"<br/><br/>2. "it's a 20 minute walk" or "it's a 20 minutes walk"<br/>Single or plural?<br/><br/>Thanks a lot for you help!!<br/>Yaron