i think that will be 4
8 u/ k) Z" S5 L) |3 F6 K5.39.217.76if you list all the number from 1 to 10公仔箱論壇1 D$ I7 u" _+ ?, G# C
seperate them into 3 groups6 { j7 n/ ~: i8 Y; d2 d0 l
from 1 to 4 has 2 numbers between them
% V9 k* A& M( {0 b5 |& P5.39.217.76from 4 to 7 has 2 numbers between them; l# z" _8 `, m+ P0 q! \, h$ i
from 7 to 10 has 2 numbers between them公仔箱論壇2 N# |3 K9 v, O5 P3 x- n1 F
so if you ask 1/3 of 10
4 @8 g& a) G6 _8 ~+ r' hthat will be 4 |