← Patterns and sequencesPatterns 006 — A pyramid of tennis ballsPatterns and sequencesPracticeMediumYour answera)b)c)Enter only the number. Use a point or comma for decimals.Check answerReveal solutionStuck? Show me one stepRelated exercisesSimilarZAP 2011, Exercise 3 — Orange pyramid stackingCombinatorics 029 — ZAP 2021, Exercise 4: Number sequencesHarderPatterns-sequences 002 — Cube figure sequencesPatterns & Sequences 004 — Cross pattern made of tilesPatterns 005 — Rectangular Dot Pattern