- MULTIPLES I DIVISORS. CRITERIS DE DIVISIBILITAT.
https://www.youtube.com/watch?v=BFgl4D9iKFE&t=661s
https://www.youtube.com/watch?reload=9&v=GBX4_mGHwZU
https://www.youtube.com/watch?v=SkwBerst0zM
https://www.youtube.com/watch?v=7bR6zYybtKU
- MÀXIM COMÚ DIVISOR (m,c,d):
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