i think that will be 4
! s* P% ~$ X- }: O0 C公仔箱論壇if you list all the number from 1 to 10
9 Q! i, G( N9 E8 S, x, G/ xseperate them into 3 groups% F8 W: J/ H- h" |. I6 w* x
from 1 to 4 has 2 numbers between them5.39.217.77:8898" F' `; h/ J" n0 ]% K6 B8 z% R
from 4 to 7 has 2 numbers between them
- L( [; |' ~' [7 y0 f# Lfrom 7 to 10 has 2 numbers between them
- x" U" \( x5 @4 G公仔箱論壇so if you ask 1/3 of 10
$ |! R8 d% G, i% a7 ^公仔箱論壇that will be 4 |