952 of them.
An infinite amount
90 palindromes.
Highest is 9999, lowest is 1000. These and everything between them have four digits. Try subtracting 999 from 9999. If you can´t, there´s always wikianswers.
from 1000 to 9999, ie 9999 - 999 = 9000
There are 120 of them.
There are 2828 integers between 1000 and 9999.
9*9*8*7 = 4536
952 of them.
An infinite amount
90 palindromes.
500 of them.
From 1000 to 9999 (inclusive) there are 9999 - 1000 + 1 = 9000 integers. Half of which are even, half of which are odd. So the answer is 9000/2 = 4,500.
There are 3168 such numbers.
Anything that has 4 digits - any number between 1000 and 9999.
Highest is 9999, lowest is 1000. These and everything between them have four digits. Try subtracting 999 from 9999. If you can´t, there´s always wikianswers.
There are 1,000 positive integers between 1,000 and 9,999, inclusive, that are divisible by nine.