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

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

One day Jenifer meets the Lion and the Tiger in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Tiger, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Jenifer:

Lion: Yesterday was one of my lying days.

Tiger: Yesterday was one of my lying days too.

What day is it?

What question can you never answer yes to?

What's the only room from which no one can enter or leave

Can you write down eight eights so that they add up to one thousand?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

What English word has three consecutive double letters?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3