well.... 32-24 is 8 and 24-18 which is 6..... so if I am correct, it would be 18-4 which is 14.... because between 32 and 24 is 8 and to get from 8 to 6 you have to subtract 2.. so I went 6-2 and that's how I got 4.
so your next number in your sequence I believe would be 14
Hope that this is right... sorry if it isn't
