Răspuns:
a) 1000
b)
1) 1302, 1032, 1230, 1320, 3102, 3012, 3210, 3120, 2310, 2130
2) 7342, 7432, 7234, 7342, 3742, 3724, 3472, 3274, 4372, 4732, 2374, 2734
3) 9436, 9346, 9634, 9364, 3946, 3496, 3694, 3964, 4936, 4396, 6394, 6934
4) 5124, 5412, 5214, 5124, 1542, 1452, 1524, 1254, 4512, 4152, 2514, 2154
5) 3520, 3502, 3250, 3052, 5320, 5032, 5302, 5230, 2530, 2350
6) 1296, 1926, 1962, 1692, 9126, 9162, 9216, 9612, 2196, 2916, 6912, 6192
(m-a terminat punctul b:)))