Solution:

1. Check the list on the tree, It's a list of 6 people.
2. A spider has woven a web near the tent. This means they must have been staying for a few days at least.
3. Two men are having lunch.
The third one is measuring the depth of the river.
The fourth one is fishing.

Solution:

12 pentagons

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:

95

Solution:

Check a lipstick mark on the glass of the kitchen.

Solution:

The girl sitting on your lap.

Solution:

The thief is encircled.

Solution:

Change your point of view and look the picture upside down.

Solution:

The Lady with no legs is the ghost.

Solution:

Look into the picture.