In mathematics, a repdigit is a number composed of repeated instances of the same digit. Examples in base ten are 11, 222, 4444, 77777, and 999999. All repdigits are multiples of repunits. One of the most famous repdigits is 666.
... of Rail Travel[?], Keighley and Worth Valley Railway
National Museum of Photography, Film and Television, Bradford
Royal Armouries Museum[?], Leeds
West Yorkshire Folk ...