This is a Yajisan-Kazusan puzzle.
The rules for Yajisan-Kazusan can be found here: Rules page
This is a Yajisan-Kazusan puzzle.
The rules for Yajisan-Kazusan can be found here: Rules page
This is a Nurikabe puzzle.
The rules for Nurikabe can be found here: Rules page
It’s definitely a perfectly accurate clock.
This is a LITS Fillomino puzzle.
The rules for LITS can be found here: Rules page
The rules for Fillomino can be found here: Rules page
In this Fillomino puzzle, all of the regions of size 4 have been indicated by letters. These regions must fulfil the rules of LITS (All tetrominoes are connected, same tetrominoes can not touch, no 2×2 regions.) Letters indicate a region of the appropriate shape.