It's no secret that parking in the city is a bitch. So we've enlisted local parking guru and author of Finding the Sweet Spot, David La Bua, to dish out weekly tips on navigating the ins and outs of city parking.

"Where is my car?", you ask yourself when you can't seem to find it in the spot you last left it. If it's really not there and your memory isn't failing you after all, it's either been stolen or towed. But which occurs more often in San Francisco? David La Bua calls this quiz "SF Cars Stolen vs. Towed: The Good, the Bad, and the City". Take this double quiz and write your answers in the comments...we'll post the answers in a few hours!

1) How many cars are towed per year in San Francisco?

A) 700 
B) 7,000
C) 70,000
D) 700,000
E) 7,000,000

2) How many cars are stolen per year in San Francisco?

A) 600 
B) 6000
C) 60,000
D) 600,000
E) 6,000,000