256
987654
5040
502 205 250 520 4 numbers. If a leading zero is allowed then you can have 052 and 025 for 6 numbers.
24
256
987654
1,023,456,789
5040
86420
24680
id say, 0123456789. but depends how many digits you can have
9,876,543,210 9876543210
9875.
502 205 250 520 4 numbers. If a leading zero is allowed then you can have 052 and 025 for 6 numbers.
Forming three three digit numbers that use the numbers 1-9 without repeating, the highest product possible is 611,721,516. This is formed from the numbers 941, 852, and 763.
There are 840 4-digit combinations without repeating any digit in the combinations.