i think that will be 4公仔箱論壇/ K' }! T; f" Z
if you list all the number from 1 to 10
( z) j, y+ |+ D. H( yseperate them into 3 groups5 k' i G+ b& ]8 G; ?9 @1 p
from 1 to 4 has 2 numbers between them
( h7 |8 ?: a% o% g( R0 _公仔箱論壇from 4 to 7 has 2 numbers between them3 t& m2 f% I) A% u2 R) \2 c, t' f9 O, ~$ u
from 7 to 10 has 2 numbers between them
6 d( j0 @, ^" s, Ctvb now,tvbnow,bttvbso if you ask 1/3 of 10
2 n/ r& Q4 }) F- [8 U' u2 `tvb now,tvbnow,bttvbthat will be 4 |