LAST EDITED ON Aug-03-01 AT 03:21 PM (EST)

binary octal
000 0
001 1
010 2
011 3
100 4
101 5
110 6
111 7

Now,

(1101011)2 = (1 101 011)2 =

(011)2 + (101)2·23 + 1· 26 =

(3)8 + (5)8·81 + 1· 82 = (153)8