Solution:

Number 3

Explanation:
Since it's a ladies bathroom, so only ladies can enter the bathroom and hence most likely the killer.

Solution:

Six.

There are only five colors, so six socks guarantee that two will be the same color.

Solution:

The Winchester brothers - sam and dean

Solution:

A Spider

Solution:

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

Solution:

None

The sum of numbers from 0-9(0,1,2,3,4,5,6,7,8,9) is 45 and therefore can be divisible by 3 and 9.

Solution:

The driver is actually the wife and mother.

Solution:

Either your read from start or from ends, it will be same

Solution:

Zouma is 3 and has two footballs.
Ake is 1 and has one football.
Kalas is 4 and has three footballs.
Aina is 2 and has four footballs.

Solution:

To do this, he must be pushing the cork inside the bottle and then taking out the coin.

Solution:

2003.

Explanation:
Its a series of prime numbes.