In fact this notion is not so difficult as it often appears to some
students, and it is in practicing that one becomes expert. Therefore we
gather here 11 training exercises on this notion, in a hope to quickly
make you an expert on it.
The most recent version

Please take note that WIMS pages are interactively generated; they are not ordinary HTML files. They must be used interactively ONLINE. It is useless for you to gather them through a robot program.

- Description: collection of training exercises on necessary and sufficient conditions. WIMS site
- Keywords: interactive mathematics, interactive math, server side interactivity, logic, necessary,sufficient