why number 8549176320 is one of a kind?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

What kind of storm is always in a rush?

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.

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Can you find out what is missing?

1 3 5
2 4 ?

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

What has many teeth, but cannot bite?

Can you count the number of triangles in the given picture?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?