This blog post has been brought to you by the number...

"17!"* 

Definitely the number of the day.  In Wits and Wagers today, it didn't matter whether the question was miles of line a pencil could draw, number of hours per day a lion sleeps, or number of Weasley kids, D's answer, later picked up by T, was 17.

*  The exclamation point in this case means excitement, and in no way implies  factorial, Tim.