Table: aus_grand_prix_2005
Columns: driver
constructor
laps
time_retired
grid

Question: What's the most laps when grid is 16?
SQL: SELECT MAX("laps") FROM aus_grand_prix_2005 WHERE "grid" = 16

Question: How many laps were there for a grid of 13?
SQL: SELECT COUNT("laps") FROM aus_grand_prix_2005 WHERE "grid" = 13