The answer is 86
Puzzle No 66: Sorting Artefact's, Professor Layton and the Spectres Call. Please see the related link below.
Puzzle No 166: Sliding Pipes (US) or Fixing the Pipes (UK) Professor Layton & the Spectre's Call. Please see the related link below.
Puzzle 129, four Balls, Curious Village. Please see Related link below for a walkthrough of puzzle 129.
Professor Layton and the Spectres Call: The Puzzle Masters House will be available to you when you have solved/completed All of the first Four Houses.
Puzzle No 1: A Secret Message, Professor Layton & the Spectre's Call. Answer = HELPSOS
Puzzle No 18: Professor Layton & the Spectre's Call. Please see the related link below for the location of this puzzle.
Sorry, Cannot find a Puzzle 255 in Professor Layton and the spectre.
professor Layton and the last specter UK professor Layton and the specters flute us professor Layton and the last call of the spectre eu
Puzzle No 7: Mopping Up, Professor Layton and the Spectre's Call. Answer = 10 Mops would be needed. 10
Puzzle No 170: The Greatest Escape, Professor Layton and the Spectre's Call See the related link below.
153
10