Geometri med skildpadde Author: Troels Gannerup ChristensenComplexity: Easy Primtal Author: Troels Gannerup ChristensenComplexity: Easy Primtal – Eratosthenes si Author: Troels Gannerup ChristensenComplexity: Easy Primtal – Er det et primtal? Author: Troels Gannerup ChristensenComplexity: Easy