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

A Japanese ship is sailing in the Indian Ocean. The captain of the ship feels tired and decides to take shower to be rejuvenated. He goes to take the shower after keeping his diamond-studded Rolex watch and gold chain on the table.
When he comes back after 15 minutes, he finds them missing. There are 4 crew members on the ship and he calls them one by one to ask them what they were doing in that duration.

Following are the answers:
1. Crew 'A' who is the cook replies that he was cooking mutton for the crew members.
2. Crew 'B' who is a housekeeper tells that he was sleeping in his room.
3. Crew 'C' who is the engineer says that he was checking on the generator.
4. Crew 'D' who is another housekeeper says that he was correcting the hoisted flag that was put upside down.

It took only a couple of seconds for the captain to find the thief. Can you find the thief too?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

In the image given, you can find several triangles. Can you count them all?

What always comes into a house through the keyhole?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Which wheel of car does not rotate when you turn your car right?

If eleven plus two equals one, what does nine plus five equal?

Solve the rebus riddle in the picture below.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?