Eight of them.
Only the multiples of 1000.
There are eight such numbers.
999
2438 of them.
11000
243
NINE (9) 1000,2000,3000,4000,5000,6000,7000,8000,9000
There are 2704 of them between 1000 and 10000 inclusive.
90 Source: Answer in back of Algebra I Book :)
There are 900 three-digit whole numbers between 1 and 1000
1024, 2048, 4096 and 8192
1001 - 1991, etc = 10, x (2,3,4,5,6,7,8,9) 8 = 80