（UK Emanuel School Entrance Examination Year $7$ Entry Question \#$28$）  When my grandma\textquotesingle s age is divided by $4$ there is a remainder of $2$.  when her age divided by $5$ there is a remainder of $3$.  But when her age divided by $9$ there is a remainder of $6$.  How old is my grandma? 
Overseas Competition->Knowledge Point->Number Theory Modules->Remainder Problems->Chinese Remainder Theorem->Chinese Remainder Theorem with Constant Remainder