Spot 5 differences in two Christmas tree below:

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

What makes this number unique: 8,549,176,320?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

What has to be broken before you can use it?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What can go through glass without breaking it?

Find the number of squares in the below picture