a : 24 = x rest 17 ==> a = 24x + 17
a : 48 = y rest 17 ==> a = 48y + 17
a : 40 = z rest 17 ==> a = 40z + 17
24 = 2^3 × 3
48 = 2^4 × 3
40 = 2^3 × 5
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c.m.m.m.c = 2^4×3×5 = 16 × 15 = 240
deci a = 240 + 17 = 257
257 este numarul cautat
Verificare:
257 : 24 = 10 rest 17
257 : 48 = 5 rest 17
257 : 40 = 6 rest 17