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

Find the missing number in the sequence below:

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

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 ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

What number do you get when you multiply all of the numbers on a telephone's number pad?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

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

Can you place three balls such that the equation shown in the picture holds true?