i think that will be 4
( Y' p, y* Y5 |公仔箱論壇if you list all the number from 1 to 10
9 x2 d1 ^6 M* I# }; i, x1 ?seperate them into 3 groups5.39.217.760 d3 f$ C9 Q8 k9 r0 f1 u
from 1 to 4 has 2 numbers between them
6 }! L" P+ n+ @6 x0 y: U" Zfrom 4 to 7 has 2 numbers between themtvb now,tvbnow,bttvb$ @& n/ X. b4 p. V0 V: A. ?5 `
from 7 to 10 has 2 numbers between them
' M7 A7 X( k/ r* y |! [' z! q1 atvb now,tvbnow,bttvbso if you ask 1/3 of 10tvb now,tvbnow,bttvb) ^' i f$ y! T
that will be 4 |