How much weight will you lose if you starve yourself for a month?

If for one day 5kg.

Not much. When you go below 800 calories a day you body says "oh! oh! we need food and there's no food here." So it goes into "starvation mode and keeps all of the fat to sustain life." It uses just...

OH MY GOSH!! Don't ever starve yourself! It is so unbelievably bad I can't explain. Try exercising for and get on a HEALTHY diet plan instead.

find if you starve yourself for three days and eat one meal on the 4th day, you can lose up to 7 pounds the first week. From then, you can lose about three pounds a week. I have done it for two...

Yes...you will. But it's not healthy at all.   Of course you will lose weight. But you will then gain it back when you start eating again (and unless you go anorexic, you will) and you will...