Question: What is the lowest Euler characteristic: V-E+F of a hexahedron or cube, which has less than 20 faces F, less than 30 edges E, and less than 8 vertices V?
SQL: SELECT MIN Euler characteristic: V − E + F FROM table WHERE Faces F < 20 AND Edges E < 30 AND Name = hexahedron or cube AND Vertices V < 8