How to make forty dollars in cash in the absolute quickest way possible?

Depends on your age. If your an adult, u could go donate plasma blood at local plasma centers. U could sell something of yours thats valuable and in good condition on www.craigslist.org in your city and state, things like jewelry, games, etc. If u post an ad on craigslist be sure to put much detail about your item/items, put up a good picture of your item/items, place a reasonable price for the item/items, and leave your number to get faster replies on your item/items. DO NOT send your item to someone or except any offer where someone will send u money for your item (its likely a scam), and when u meet someone to sell the item be sure to meet at a public place. Or u can search the "wanted" section under "for sale" category on craigslist to see if u have any of the items people are wanting. If your not an adult, u can babysit, pet sit, walk dogs, mow lawns, run errands for people, or clean people's homes with your parents permission of course. Hope this helps :)

The quickest easiest way would be to invest in the stock market. You can make that much but you will need the capital. Your portfolio return would depend on your capital. You can also fund raise, if you have friends that can help you that would be awesome but if not perhaps try resale. Maybe find a rich "friend". It would all depend on what you need the money for, see I have experience raising funds for a non-profit and searching for sponsors and what not. You can get that money but it will take creativity to find it. Good Luck!

sell something worth $200 for $40

Sell to a pawnshop or have a grage sale.

Sell something you own, cut grass, babysit someone else's kid(s), etc.

sell