Are there sites that offers work at home opportunity without investment?

Hundred questions a day here like that. 99.9% seem to be selling software or getting your money to sign up for useless scams. 0.05 % are people who's real jobs let them work from home from tim...

subway and or the baskin robbins ice cream franchises... also worth considering is a relatively new company calle purofirst (they do disaster clean up) low start up and mmediate high profits

Savings Bonds they are inexpensive and sell at a 50 percent discount from their face value: a $50 bond costs $25. Or you can buy $30,000 worth, the maximum amount of bonds in any one year for $15,0...

As the name implies, sensitivity analysis examines how an end result (for investments, total return/end value) is dependent upon an input variable. For real estate, you would probably want to look ...

Pickup your mattress, cut a hole in it and insert.

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Sounds to me that either you promise a 15% return or you explicitly say "I'll invest your money which will give you approximately 15% return however, there is no guarantee. Otherwise you...

Food, water, fabric for clothing because everyone needs them.