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

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Different lights make me strange by changing me into different sizes. What am I?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

81 x 9 = 801. What must you do to make the this equation true?

You can see it everyday, But cannot touch it at will. What is it?