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

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

Prove that the below maths equation is true.

8 + 8 = 91

What 5-letter word typed in all capital letters can be read the same upside down?

Decode this picture on T-Shirt and tell what it says ?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?