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

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

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

Complete the table series riddle by finding the number that can replace "??".

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

Why is the longest human nose just 11 inches?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Keyboard words are not in alphabetical order, Why?