CREATE TABLE "polyhedra" (
  "name" text,
  "vertices_v" real,
  "edges_e" real,
  "faces_f" real,
  "euler_characteristic_v_e_f" real
);

Question: What is the total number of E edges of the polyhedra with vertices V greater than 20?
SQL: SELECT COUNT("edges_e") FROM "polyhedra" WHERE "vertices_v">20;

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 "polyhedra" WHERE "faces_f"<20 AND "edges_e"<30 AND "name"='hexahedron or cube' AND "vertices_v"<8;