Dr333

i think that will be 4  D% l) E6 U' s- q+ s
if you list all the number from 1 to 10tvb now,tvbnow,bttvb* y; y" f! X- y( E) O$ i& Z
seperate them into 3 groups
! J5 {+ h6 N7 q) J5.39.217.77from 1 to 4 has 2 numbers between them
" `9 R$ s9 O( P: @; K" @5.39.217.77from 4 to 7 has 2 numbers between them公仔箱論壇3 A4 m  R# e* Q* J2 \* I
from 7 to 10 has 2 numbers between them公仔箱論壇5 d1 W$ E! B2 B, d4 C! ]: x
so if you ask 1/3 of 10( l! |6 m* L6 F2 a* e
that will be 4