Ingenuity (noun)

1. The quality of being clever, original, and inventive.
2. The ability to find simple and clever solutions to problems.

Origin:

Late 16th century (in the sense "natural skill"): from french ingénuité, or latin ingenuitas, from ingenuus "natural, noble".

Examples:

1. The ingenuity of the inventor led to the creation of a revolutionary new device.
2. The escape plan required a great deal of ingenuity.
3. Her ingenuity in cooking was impressive.
4. His ingenuities allowed him to make money without working.
5. The puzzle required a lot of ingenuity to be solved.