What does this below rebus puzzle mean?

Spot 5 differences in two Christmas tree below:

If it took eight men ten hours to build a wall, how long would it take four men to build it?

When it is alive we sing, when it is dead we clap our hands. What is it?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"