When monkey rotate the gear, which mark will be hit 1 or 2 ?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What country can make you shiver?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

Who is that with a neck and no head, two arms and no hands? What is it?