Why do we preferably have round manhole covers and not square ones?

Identify The phrase in the picture.

What time is it when an elephant sits on a fence?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Prove that the below maths equation is true.

8 + 8 = 91

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?