The least 4-digit number you can make with the digits 4, 7, 6, and 0 is 4067. To form the smallest number, you should start with the smallest non-zero digit, which is 4, followed by the next smallest digits arranged in ascending order.
It could be: 4760 = 1
0
To make a number divisible by 10, its last digit must be 0. The last digit of 23483 is 3. Therefore, to make it divisible by 10, you should subtract 3 from 23483. This means the least number that should be subtracted is 3.
1
Using a calculator will make it easier
It could be: 4760 = 1
3 x 4 x 4 x 4 = 192 of them
4067, 4076, 4607, 4670, 4706, 4760, 6047, 6074, 6407, 6470, 6704, 6740, 7046, 7064, 7406, 7460, 7604, 7640.
0
To make a number divisible by 10, its last digit must be 0. The last digit of 23483 is 3. Therefore, to make it divisible by 10, you should subtract 3 from 23483. This means the least number that should be subtracted is 3.
1234
Since the 1-digit number is explicitly required to be positive but the 2-digit number is not so constrained, the obvious solution is to make the 2-digit number negative. This gives 9*(-99) = -891
1
what is the largest 4-digit number you can make
It is already a four-digit number.
1234, if you don't repeat any.
In order to make the smallest possible number with a set of digits, you want the least valued number in the greatest valued place. For 5 digits, you would want the least digit, 0, in the ten thousands place. You would then want the second least digit, 3, in the thousands place, and so on. For the digits 0,3,5,7,9 the smallest possible number would therefore be 03,579 or 3,579.