There are 625 of them - too many to list.
9,000
The numbers from 1000 to 9999 are all 4 digits, as are -1000 to -9999. Therefore there are 18,000 four-digit numbers in all.
The numbers from 1000 to 9999 are all 4 digits, as are -1000 to -9999. Therefore there are 18,000 four-digit numbers in all.
2240
Any four-digit number that ends with 0, or with 5: 1000, 1005, 1010, 1015, ... 9990, 9995. If you want to have the complete list, I'll leave this fun part to you. Better write a computer program to list them.
Nope, look at 1000, this is a 4 digit number and we can't list it with 1,2,3, and 4
The number of four-digit combinations is 10,000 .Stick a '3' before each of them, and you have all the possible 5-digit combinations that start with 3.There are 10,000 of them. They run from 30,000 to 39,999 .
5*5*4*4 = 400
9
Even numbers are divisible by two, and half of all numbers are even, so there is a 50 percent chance that a four-digit number is divisible by two.
Total possible 4-digit numbers= 1000, 1001,...,9999 = 9000 Total with same digit numbers = 1111,2222,...,9999 = 9 9000 - 9 = 8991