I am white when I am dirty, and black when I am clean. What am I?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What is the end of everything?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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