i think that will be 4
7 c/ G: B! @+ h: Q8 d' k$ I公仔箱論壇if you list all the number from 1 to 10, ]' X- Z0 Q8 z
seperate them into 3 groupstvb now,tvbnow,bttvb; \; O4 W& K/ V( {! Y
from 1 to 4 has 2 numbers between them
, l. b% @* c% Q8 G7 |1 V( Ltvb now,tvbnow,bttvbfrom 4 to 7 has 2 numbers between them
' J9 J* j& y) [6 ]公仔箱論壇from 7 to 10 has 2 numbers between themtvb now,tvbnow,bttvb* e) ]0 h& ?# x, |! B+ v
so if you ask 1/3 of 10
* C! m% k2 Y8 { T, k1 v G0 \tvb now,tvbnow,bttvbthat will be 4 |