what's the probability of getting a king or a queen from a pack of 52 cards?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

You bought me for dinner but never eat me. What am I?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Can you name some countries which do not have the alphabet 'A' in them?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?