Solution:

There is a simple logic to solve this question.
The size of the chocolate is 2 x 8. Thus, you need to have 2 x 8 = 16 pieces.
Every time you break the chocolate, you will get one extra piece.
Thus, to get 16 pieces, you must break it (16 - 1) = 15 times.

Solution:

"World War I" was named after after "World War II"

Solution:

Uncle Scrooge tells him he took the loan to keep his expensive car safe and he also saves money on security and parking rent.

Solution:

Terry was in the lift.

Solution:

The cowboy can fit the horses as shown below.

[T] [E] [N] [H] [O] [R] [S] [E] [S]

Solution:

The girl sitting on your lap.

Solution:

11

You already knew the answer wasn't 26 letters. That would be too easy.
The letters in the words "the alphabet are 11

Solution:

24 Years

If you were 8 years old 8 years ago, then your current age is 8 + 8 = 16 years old.
After 8 more years pass, your age will be 16 + 8 = 24 years old.

So, you will be 24 years old in 8 years from now.

Solution:

"Six" (6)

When you remove the first letter "S" from the word "Six," you are left with the letters "Ix."

"Ix" is the Roman numeral representation of the number 9.

Thus, the wordplay involves the transformation of "Six" (6) into "Ix," representing the number 9, which is an odd number in Roman numerals.

Solution:

10

38 Sheeps = 30 ate sheeps (30 ate sounds like 38)
There's 40 Lions in a field, 30 ate Sheeps

So if you do simple maths 40 - 30 = 10
the answer is 10