Question 27
Determine the number of positive integers, which written in base 10, satisfy the following conditions simultaneously:
(i) they are 6-digit numbers;
(ii) the product of their non-zero digits is 84;
(iii) four of their digits are 2, 0, 1, 7.
(i) they are 6-digit numbers;
(ii) the product of their non-zero digits is 84;
(iii) four of their digits are 2, 0, 1, 7.