Solution:

Steps
1. Monica go from side A to B for approx 59 minutes
2. Lisa then move back to side A for 2 minutes to fool guard. Now guard will think she is coming to side A.
3. then she again move toward B :-)

Solution:

Of course, it is impossible. Into the second room should have gone the 2nd guest, because the 13th guest was waiting in room number 1

Solution:

Both would be the same distance from City owlna. (since they are at a same point)

Solution:

Simply push the cork into the bottle and shake the marble out.

Solution:

Kristen Stewart is the youngest

Solution:

99+9/9 = 100

Solution:

Take a bottle of drinks from the "whiskey and coke bottles" box.

If there is a whiskey bottles then you know that is the "whiskey bottles" box since ALL THE boxes are labeled incorrectly.

This means the box marked "whiskey bottles" must be "coke bottles" and the box marked "coke bottles" must be "whiskey and coke bottles".

Solution:

Six.

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

Solution:

2 cakes

At each toll bridge you are required to give half of your cakes, and you receive one back. Which leaves you with 2 cakes after every bridge.

Solution:

Only one(dead one)

other flew away :--)