Solution:

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

Solution:

Suit and Female-legs

Solution:

The Lady with no legs is the ghost.

Solution:

Look into the image for more details.

Solution:

Look into the picture.

Solution:

Its explained in the picture and video

Solution:

O + Pi + nion (Pi In Onion)
= Opinion

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.