What you cannot hold but it is yours?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

A Club organizes a Running Race, and John, Jacob, Minda, and Tony participated.

The results are as follows

John beats Jacob
Minda beats Toni
Toni beats John

Who came first in the race?

That attorney is my brother, testified the accountant.

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

Who is lying?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

How many letters are in the alphabet?

When 99 is considered higher than 100?

Spot what is wrong here in below Picture?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?