| We can rule just about all of those out because, although they may be fine pictures, there is no X factor to make them special. |
| It's exactly the sort of situation where Madsen's energetic X factor might have provided a crucial boost. |
| A motormouth jitterbug with a shiny dome, he was the X factor, goosing the rhythm and galvanizing the offense. |
| They played hard, they made mistakes, but they were missing the X factor that makes championship teams. |
| His main problem is deciding whether individual paintings have that X factor that makes them work. |
| Multiply your X factor by 159 to reach a daily total of 2,067 calories a day. |
