is it possible to lose weight if nothing is consumed for a few days?

DONT DO IT!
But yes, you would loose weight, but it would be mostly water and glucose, so as soon as you start eating again, they will go back on! The best thing to do would just eat healthy for a longer time than a few days.

you will lose weight slowly. Mostly water weight first. Your body will try to survive on any fatty tissue you have so you will lose a little weight, make sure you continue to keep yourself well hydrated. Also I hope you are not planning on doing this. It will cause your body more harm than any good that could come from it.

no your system will store fat from the absence of food.. heres a suggestion try rave diet.