They are all single digit numbers.
1234567890
Maybe something like this is what you're looking for: 3703703670 - 2469135780 = 1234567890 OR... 2345679000 - 11111111110 = 1234567890
24 different numbers.
100000 - including numbers with leading 0s
u culd make 80
They are all single digit numbers.
Oh, what a happy little question! With the digits 1-9 and 0, you have 10 options for each digit in a 4-digit number. So, you can form 10 x 10 x 10 x 10 = 10,000 different 4-digit numbers. Isn't that just delightful? Just imagine all the beautiful combinations you can create!
1234567890
There are 7,290 different 4-digit numbers that can be formed from the digits 1-9 without repetition.
Maybe something like this is what you're looking for: 3703703670 - 2469135780 = 1234567890 OR... 2345679000 - 11111111110 = 1234567890
24 different numbers.
10,000
100000 - including numbers with leading 0s
Any 3 out of 4 = 4. Each set can be arranged 6 ways so 24 different numbers.
Without repeats there are 4 × 3 = 12 possible 2 digit numbers. With repeats there are 4 × 4 = 16 possible 2 digit numbers.
The answer is 2,469,135,780.