Răspuns:
a:38=C rest 7=>a=38C+7
numerele cuprinse intre 100 si 999
100 < 38C+7 < 999
100 < 38C+7 => 93 < 38C
999 > 38C+7=> 772 > 38C
93 < 38C < 992
38·3=114 > 100 ; 26·38=988 < 999
C = 3,4,5,6......26
a:38=3 rest 7=>a=38·3+7=>a=121
nr cautate sunt multiplu de 38
121+38=159+38=197.....
numerele in baza 10 sunt: 121,159,197,235,273,311,348,387,425,463,501,539,577,615,653,691,729,
767,805,843,881,919,957,995
