"num facts" is a very handy skill to understand the numbers that we use in our daily life. A number in form of a digit or in form of a year represents a fact. This skill gives you that information handy whenever you query Alexa.
Q1: Alexa ask num facts for math fact for six Alexa: "the smallest perfect number" Did you know this?
Q2: Alexa ask num facts for year fact for one nine one eight Alexa: "Bessarabia votes to become part of Romania" Did you know this?