Răspuns:
2³·3²=8·9=72
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60=2²·3·5
195=3·5·13
cmmdc(60,195)=3·5=15
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78=2·3·13
65=5·13
cmmmc(78,65)=2·3·5·13=390
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nr de forma 3a7b care se impart la 45 trebuie sa aiba ultima cifra 5
3375,3675,3975
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D₃₆₀={1,2,3,4,5,6,8,9,10,12,15,18, 20,24,30,36,40,45,60,72,90,120,180,360 }
nr 360 are 24 divizori