Solution:

Wristwatches

Most of us must have assumed the answer to be a ring in the wrong finger but that's not the case as it's a normal ring. The error is in the watch. Wristwatches are manufactured with the adjustment pin always on the right side.

Solution:

The pic is from 70's Era and modern cell phone was not around at that time.

Solution:

The girl sitting on your lap.

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.