Question

how many numbers can be formed from the digits 1,2,3and9 if repetition is not allowed
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Answer 1

Answer:

Numbers form from 1,2,3and 9 are:-

1239,1293,1329,1392,1932,1923,2139,2193,2319.2391,2931,2913,3129,3192,3291,3219,3921,3129,9123,9231,9321,9.

Answer 2

Answer:

possible number formed by digit 1,2,3,and 9

=1,2,3,9,31,32,39,21,23,29,12,13,19,91,92,93,123,132,192,193,191,129,932,923,913,912,1239,

1293,1923,1329,2139,2931,2193,2391,2913,3219,3912,3921,3291,3129,3192,9123,9132,

9123,9213,9231,9321,9312

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