Solution:

The boy in the center. He doesn't have any shadow.

Solution:

Bucket-3

Solution:

90 minutes.

1st Pill, 12:00
2nd Pill, 12:30
3rd Pill, 13:00
4th Pill, 13:30

Solution:

Its explained in the picture and video

Solution:

All men lose the upper body and getting less for exchange. In this way, the losses of parts, account for one vanished one.

Watch the video for more detail.

Solution:

The third Man as there is no shadow of the man.

Solution:

All are at an equal distance from the ceiling.

Solution:

Red or Tan

Explanation:
The numbers of letters in each color get reduced by one on every row.
Scarlet = 7
Orange and Yellow = 6
Green, Brown, and black = 5
Gray and Blue = 4
So the next color should be of three words like Red or Tan.

Solution:

4th Image

Images 1st 2nd & 3rd are images of the right hand while the 4th image is of the left hand

Solution:

Pink gift box.