What is the longest word in the dictionary?

Can you solve the below tricky visual equation?

What's the only room from which no one can enter or leave

Which is the correct shadow of the bird?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

Using eight eights and addition only, can you make 1000?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What is the relationship between these matchstick pictures below?