Eleven.
5080
1-10000 Simple, minus 10,000 by 2 There's your answer. 99,998
9998.
198 palindromes.
1229
Int(10000/3) = Int(3333.3) = 3333
111 of them with a remainder of 1
4000 times.
There are 3,333 multiples of three that fall between 1 and 10,000.
There are: 640/9 = 71 with a remainder of 1
9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92