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2014-11-08T12:54:17+02:00
A) n =6·13 +r    r< 6  r∈{0,1,2,3,4,5}⇒ n∈{78,79,80,81,82,83}
b) n = 9·103 +r  r <9  r∈{0,1,2,3,4,5,6,7,8}    n∈{927,928,929,930,931,932,933,934,935}
c) n= 7·32 +r    r <7    r∈{0,1,2,3,4,5,6}      n∈{224,225,226,227,228,229,230}