（AMC 2018 Question \#27）  A teacher wants her students to guess the three-digit number that she is thinking. She gives these clues:  \textbf{• It is divisible by both 3 and 11.}  \textbf{• If you subtract one, the result is divisible by both 2 and 7.}  Which number is it? 
Overseas Competition->Knowledge Point->Word Problem Modules->Inverse Operation Problems->Inverse Operation Problems with Multiple Variables