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Afla toti multiplii comuni ai numerelor 3 si 7care se gasesc intre 20 si 70

Răspuns :

M3={0,3,6,9,12,15,18,21,27,30,33,36,39,...}
M7={0,7,14,21,28, 35,42,49,56,63,70...}
M3UM7={21,42,63}
Toți multiplii 3={21,24,27,30,33,36,39,42,45,48,51,54,57,60,
63,66,69}
7={21,28,35,42,49,56,63}
Multiplii comuni
={21,42,63}

Sper că te-am ajutat !!!