Solution:

The Lady sitting in the chair has the detector attached to the back of her blouse.

Solution:

30

Explanation:
It's very difficult to count an actual number of balls but it can be counted mathematically as illustrated below.

Balls in lowest level most level, say level 1 : 4 * 4 = 16
Level2 => 3 * 3 = 9
Level3 => 2 * 2 = 4
Leve4 => 1

Summing up 16+9+4+1 = 30.

Solution:

Solution is shown in image below

Solution:

There are 16 tigers in the picture.

Solution:

Watch the video for more detail.

Solution:

The attached picture gives away the solution. If you can find another solution, do send us yours.

Solution:

In this picture, he saw another man. If you try to look near the right end of the picture, you will find a fan. Go down for the phone that is plugged on charge. Go further down and you will find a man's face. An eye is particularly visible. The man was hiding behind the bed when the husband arrived in her room. This made him believe that his wife was cheating on him.

Solution:

The matchsticks that are marked with red are to be removed and the final figure will have just two squares. You can remove either pair from the possible four ways.

Solution:

I(1) + ate(2^3 is 8) + Some(Sum symbol) + Pie(Symbol)
= I Ate Some Pie and It Was Delicious

Solution:

A) The caretaker

There is no blood, but the woman is dead. Her mouth and eyes are also open. She was put to death using a non-bleeding technique.

The chef with the knives and the waitress with the gun couldn't have murdered the woman.

Therefore, the murderer who used a rope to strangle the victim is the caretaker.