This is the second part of the game 'Hotel Steal Episode',
and I finished it without walkthrough.
There is 'To be continued', so let's wait for the next episode ;)
By the way, the problem is that the items are too small to find,
and I can hardly figure out the door of the basement without other's comment.
Hope the keyhole of the door of the basement will change bigger
For the math part to solve with 6 question marks, it's great to be related to math of puzzles, I even use linear algebra to solve it, but I found I just think too complicated to it :P
I like this kind of puzzle :D
Spoiler:
To someone get stuck, pick up the key, then use key(drag it) to the left-bottom part that looks like the door of the basement.
And do I misunderstand the puzzle of x multiple y and plus (y - 1)?
I thought the solution is that, just like
3 multiple 2 and plus 1 = 7,
5 multiple 4 and plus 3 = 23...
so the last one should be
10 multiple 9 and plus 8 = 98,
But in game, I should click it to 99 to solve the puzzle.
Did I compute it with wrong way???