i think that will be 4 
  [- y) B6 |7 q9 e公仔箱論壇if you list all the number from 1 to 10" z, K$ P) |9 G0 X- O/ g# ^ 
seperate them into 3 groups 
* E  X. R2 v$ w. z9 u4 I9 Jtvb now,tvbnow,bttvbfrom 1 to 4 has 2 numbers between themtvb now,tvbnow,bttvb" _; L/ O# }) r# R. ^ 
from 4 to 7 has 2 numbers between them 
6 k) V2 `+ S  b7 n( Y: [9 m( z+ Pfrom 7 to 10 has 2 numbers between them 
5 d& M* x- R6 b- _( [www2.tvboxnow.comso if you ask 1/3 of 10公仔箱論壇1 o; [1 K( J8 n! b7 H" r) D+ \ 
that will be 4 |