"Easy" vs. "simple" [closed]

Are those two words equivalent or is there a difference? When would I say something is easy rather than simple, or vice versa?

I would say the difference lies in the context. If something can be achieved (as a task) without difficulty I would say it was easy. If something can be understood without difficulty I would say it was simple.

My maths test was easy because the questions were so simple.

The children were given the simple task of reciting the alphabet. Only a few found this task easy; many had difficulties.

Losing weight in theory is simple. Losing weight in practice is not so easy.

Simple may refer to a lack of complexity in an object itself: it describes the actual object. 'Easy' refers to the use of something that might be complex in itself, but whose use has been made straightforward because of eg. good instructions. Example: a door lock with few parts may be called 'simple', but not 'easy' (unless you're talking about how to use it), whereas an instruction manual for an object that makes a complex process do-able because of a good explanation might make that object 'easy' to use (because of the instructions). A door lock might be simple, but it probably won't be easy. Bit vague without knowing the context, but that's arguably one difference between the two words.