Table: world_champs_motorcycle
Columns: country
motogp_500cc
350cc
moto2_250cc
moto3_125cc
80cc_50cc
total

Question: how many total number of moto2/250cc when country is united states
SQL: SELECT COUNT("moto2_250cc") FROM world_champs_motorcycle WHERE "country" = 'United States'

Question: how many minimum 350cc has
SQL: SELECT MIN("350cc") FROM world_champs_motorcycle

Question: how many country has moto3/125cc with 15
SQL: SELECT "country" FROM world_champs_motorcycle WHERE "moto3_125cc" = 15