57
24
There are 17 of them.
Excluding numbers with leading 0s, there are 6804 such numbers.
Leaving out 077, since it is actually a two digit number, the answer is 35.
1
There are 6804 such numbers.
the right answer is 10 cause there is o,1,2,3,4,5,6,7,8,9 so there 10 numbers in total which have 1 digit
24
There are 17 of them.
Excluding numbers with leading 0s, there are 6804 such numbers.
If you include the number 3,000, there are exactly 2,001 4-digit numbers between 500 and 3000.
Leaving out 077, since it is actually a two digit number, the answer is 35.
1
Exactly 2: 243 of them.
120 and 124, among others.
18
Exactly 3,628,800, or 10!.