Question: how many total number of moto2/250cc when country is United States
SQL: SELECT COUNT("Moto2/250cc") FROM "1-2889810-2" WHERE "Country" = 'United States';

Question: how many minimum 350cc has
SQL: SELECT MIN("350cc") FROM "1-2889810-2";

Question: how many country has moto3/125cc with 15
SQL: SELECT "Country" FROM "1-2889810-2" WHERE "Moto3/125cc" = 15.0;