i dont no
Yuo can make only one combination of 30 digits using 30 digits.
2578 5287 5782 8572
If using the compressed format, where a byte holds two decimal digits (because only 4 bits are needed to make nine), so two bytes would be four decimal digits, the largest which is 9999.
9531
You cannot because there are no duplicate digits.
( ( 6 / 6 ) + 6) * 6
3*3*2*1 = 18 of them.
Yuo can make only one combination of 30 digits using 30 digits.
Yes
4 x 3 x 2 ie 24
Twelve of them.
9876 is the largest four digit number you can make if all the digits must be different.
If you have to use all four digits - 1349. If you can use them in a sum 9-4-3-1 = 1
61 is prime. You cannot make 61 by multiplying four digits.
If you use them only once each, you can make 15 combinations. 1 with all four digits, 4 with 3 digits, 6 with 2 digits, and 4 with 1 digit. There is also a combination containing no digits making 16 = 24 combinations from 4 elements.
You can make three even numbers out of the digits 4, 5, and 6 by using the digits 4 and 6 twice: 464, 466, and 446.
2578 5287 5782 8572