Question

If the sum of all four-digit numbers that can be formed using the digits 0, 1, 2, 3, 4 no digits being repeated in any number is k, then find the sum of digits of k.

Answer 1

Answer:

So, the fourth blank has only one option and it can be filled by the remaining one digit. Therefore the number of four digit numbers formed using 0, 1, 2, 3 is 18.

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