Why Aeroplane windows are round?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you place three balls such that the equation shown in the picture holds true?

Which alphabet letter is a question?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Find the next number in the following series:
6, 14, 26, 98, __?

Rihana, Peeta, and Logan order a pizza for $10. Out of the three, Rihana and Peeta were quite hungry and ate 6 slices a piece, while Logan had just 2 slices.

Now, they want to split the cost among them fairly but due to the lack of change, they decide to round off the cost to the nearest possible dollar.

Can you find out the fairway which should be used to split the money?

What if the pizza was worth $11?

I can be cracked, made, told, and played. What am I?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?