Question: What is the value of the coin weighing 10.5 g and made of Cupronickel?
SQL: SELECT "Value" FROM "2-158806-3" WHERE "Composition" = 'Cupronickel' AND "Weight" = '10.5 g';

Question: What is the coin with a € equivalency of 0.30 made of?
SQL: SELECT "Composition" FROM "2-158806-3" WHERE "€ equiv." = '0.30';

Question: What is the coin that weighs 3 g made of?
SQL: SELECT "Composition" FROM "2-158806-3" WHERE "Weight" = '3 g';

Question: What is the diameter of the coin with a € equivalence of 0.60?
SQL: SELECT "Diameter" FROM "2-158806-3" WHERE "€ equiv." = '0.60';

Question: How much does the coin with a 14mm diameter weigh?
SQL: SELECT "Weight" FROM "2-158806-3" WHERE "Diameter" = '14mm';