how would you take $100 and double it within a week?

Ask your parents to write you a check for $100.

poker

roulette double or nothing….I would just bet it all on black.

I would attend an auction at a storage rental site and bid on an entire storage unit take the items to the swap meet and sell the items saving the best items to sell on ebay, ubid or other online auction site. Often units that have been abandoned auction for 50 to 100 dollars and just a few items in the unit may recover your cost the rest is proffit. Obviously you would review the contents to be sure you could recover you cost plus.

Sell some of your stuff if you really need the money.

If there was a easy and legal way to double your money everybody would be rich in a year. Nothing that I can think of will reliably provide what you are looking for.

Selling drugs might.. But if you haven’t thought of that already I doubt you could pull it off in a week.

Buy broken (discounted) things that you know how to fix. Fix them, then resell in working condition.

Buy textbooks at garage sales and sell them on Amazon?

Are you charging for your labor? A yard sale is fun, empties out your attic and garage, makes you some new friends and puts cash in yr pocket. But it is labor-intensive.

Get a job?

Buy a $100 outfit and sell yourself on the street?

(j/k)

Study the stock market. Options tend to have pretty high ROI’s, and you can buy into companies whose stocks sell for much higher prices. But I’ve been studying for much longer than a week, and I’m confident in my ability to double my money, just not in seven days.

Find a restaurant that needs a menu update. Tell them you can do it for $100 and $100 in free meals.

Post an ad on craigslist saying $100 in food for a menu design. Then, give away the food and keep the $100. (Make sure you find a restaurant who’s menu update would be worth $150 at least)

if you still have the 100$ fold it over and put it back in your pocket now you“ve just doubled your money.

For all of the hassle you might as well go to McDonalds, get a job work for a day and a half, quit and take the five and a half days that you saved off. There’s no risk and less work than the alternatives.