What number when divided in half becomes zero?

what does this picture(rebus) riddle means ?

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

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

Which is faster, Heat or Cold ? Explain.

What is the best name for Gambler Girl Friend?

I cannot talk, but I always reply when spoken to. What am I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Why do Chinese men eat more rice than Japanese men do ?