Solution:

90 minutes.

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

Solution:

Bucket-3

Solution:

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

Solution:

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

Solution:

Tire marks of right's man car are matching.

Solution:

3

Explanation:
If I had 4 eggs -- Its just imagination.
A thief gives me 3 -- I go three eggs.
My farm rooster lays 5 eggs -- A Rooster can't lay eggs.

Solution:

A

Solution:

They are playing basketball with a soccer ball.

Solution:

Chilwell can go through as all the person whose name contains even number of letters can go through the door.

This is a classic green glass door riddle.

Solution:

41

There are 6 people alive, plus you and there are 34 people dead. Making it a total of 41 people in the room.