Hi Wonderlanders,
Congrats to all who have completed the level
As for the poser question - well, yes my correct answer assumes the 12 books would be stacked in numerical sequence, left to right

(I don't know anyone who would have them placed differently)
Therefore each book is 4cm thick (3cm pages + 2 x .5cm for the cover)
However - the FIRST page of book 1 is on the RIGHT of the book - the LAST page of book 12 is on the LEFT of the book.
Therefore the total distance between First page of book1 to Last page of book 12 =
12 x 4 = 48 cms minus 1cm (2 outside covers) minus 6cms (pages of book 1 & book 12) = 41 cms
Malcdelsol
