Question 489845
You are right about natural numbers (1,2,3,...) and whole numbers (0 + set of naturals). A rational number is a number that can be expressed as a ratio of two integers (e.g. ...-2,-1,0,1,2,...), and an irrational number cannot be expressed in this way.


For this type of problem, I would recommend you search Google or some other search engine for definitions of mathematical terms for a quicker answer.