← CombinatoricsCombinatorics 034 — ZAP 2018, Exercise 7CombinatoricsZAP 2018MediumYour answera)b)c)d)Enter only the number. Use a point or comma for decimals.Check answerReveal solutionStuck? Show me one stepRelated exercisesSimilarPatterns-Sequences 001 — A tile pattern with square numbersPatterns 007 — Squares of matchsticksHarderPatterns-sequences 002 — Cube figure sequencesPatterns & Sequences 004 — Cross pattern made of tilesPatterns 005 — Rectangular Dot Pattern