Question

Write all possibile 4 digit number using
0, 1, 9,8 only once and
once and arrange them in
descending order​

Answer 1

Answer:

0198, 0189, 0918, 0981, 0819, 0891, 1098, 1089, 1890, 1809, 1980, 1908, 9810, 9801, 9180, 9108, 9018, 9081, 8910, 8901, 8190, 8109, 8019, 8091

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