Răspuns:
a) n:18=c₁ rest 2=>n=18c₁+2=>n-2=18c₁
n:30=c₂ rest 2=>n-2=30c₂
n:24=c₃ rest 2=>n-2=24c₃
18 = 2·3²
30 = 2 ·3 ·5
24 = 2³·3
n-2=cmmmc(18,24,30)=2³·3²·5=8·9·5=360
n-2=360=>n=360+2=>n=362
362:18=20 rest2
362:30=12 rest 2
362:24=15 rest 2
b) 1500 <n< 2500
M₃₆₂=362, 724, 1086, 1448, 1810, 2172, 2534
1500 < 1810+2;2172+2 < 2500
n=1812,2174