i think that will be 4
# \! S* m8 K* O9 p* C5.39.217.77if you list all the number from 1 to 10* ^, _3 L% v6 T
seperate them into 3 groups
8 u* l7 T* ]* ~$ N5.39.217.77from 1 to 4 has 2 numbers between them公仔箱論壇8 M. N/ M: U) H3 N, L
from 4 to 7 has 2 numbers between them公仔箱論壇8 G9 B/ t* T9 G
from 7 to 10 has 2 numbers between them
0 E+ v8 ^! D/ A, j% C, Z5 x1 G- Aso if you ask 1/3 of 10; \, n$ i8 z6 Z
that will be 4 |