A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

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?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Can you find out the number that should replace the question mark with a valid reason?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?