How many numbers are there between $$0 \sim 50$$ that do not consist of digit \textquotesingle$$6$$\textquotesingle?． 
Overseas Competition->Knowledge Point->Counting Modules->Questions Involving Enumeration->Enumeration
$$6, 16, 26, 36, 46$$  $$51$$ numbers minus $$5$$ numbers -\/-\textgreater{} $$45$$ numbers 