Note:
on the memory room, wait till all the 4 blocks re-appear before going to the next stage, otherwise the clock will always remain at 0 (this is UI and not mechanics) it will eventually finish once the timer hits 0. Even though the timer doesn't display.
Answers to the memory room:
stage1:
1,1,1,1
Stage 2:
2,3,1,1
Stage 3:
2,4,2,2
Stage 4:
3,4,3,3