Prove that twice of ten is the same as twice of eleven.

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

I always drive my customer away.

Who am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

I have branches, but no fruit, trunk or leaves. What am I?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99