Răspuns:
A) a:23=4c/*23 (rest c)(=) a=4c*23+c(=) a=92c+c(=)
B)a:23=4r(rest r) (=) c*4=r(=)a:23=c(rest r) (=) r divizibil cu 4(=)r={4;8;12;16;20;24;28....}(=)
(=) c={1;2;3;4;5;6;7......} (=)
(=) a:23=1(rest 4)(=) a=23+4(=) a=27
(=)a:23=2(rest 8)(=) a=23*2+8(=)a=46+8(=)a=54
(=)a:23=3(rest 12)(=) a=23*3+12(=)a=69+12(=) a=81
(=)a:24=4(rest 16)(=) a=23*4+16(=)a=92+16(=) a=108
(=)a:23=5(rest 20)(=) a=23*5+20(=)a=115+20(=) a=135
Explicație pas cu pas: