How to Unlock all of Layton's Challenges
You must take them one at a time. The Musician's house (must have taken 9 photographs and spotted all the differences),
The Tea Master's house,(must have served tea to 26 thirsty people) The Animal Lover's house,(must have given hammy the hamster at least a 30 step workout)
The sweetheart's House,(must have saved after watching the credits)
The Puzzle Doctor's House,( must have solved at least 150 puzzles) each are unlocked separately after completion of certain puzzles, procedures, or tasks. There are 15 puzzles and you can must ask them separately or use the link for the related questions below this answer for the puzzle numbers that are available
Puzzle 142, The Scholars Life, Location: Tea Masters House. Answer = The Mathematician lived for 84 years.
You must have already answered 150 puzzles correctly to get the Puzzle Masters House open Puzzle Masters House. Please see the Related link below for a walkthrough of Frequently asked questions.
Puzzle No 144: Super Pancakes. Location, Tea Masters House. Please see the Related link below for a walkthrough of puzzle 144.
Puzzle No 153: Ultimate Escape (UK) , or The Diabolical Box (US) Location: The Puzzle Doctors House. Please see the Related link below for a walkthrough of puzzle 153.
Puzzle No 153: The Diabolical Box, Location: The Puzzle Doctor's House. Please see the Related link below.
Please specify a puzzle number.
Weekly puzzle No 8: What Number. Professor Layton and the Diabolical box, weekly puzzle No 8. Please see the related link below for a walkthrough of this puzzle.
Puzzle 153, Ultimate Escape, Location: The Puzzle Doctors House. Please see the Related link below for a walkthrough of puzzle .
Puzzle 148, Eight Cards, Location: The Sweethearts House. Answer = 582 x 3 = Result = Answer 1746
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Puzzle 60 Plaza Puzzle, Location: Station Exit
Puzzle 139 Coast To Coast, Location Layton's Study. - Musicians House. Please see a Related link below for a walkthrough of puzzle 139.