I read $1$ page of a book on Nov $1$, $2$ pages on Nov $2$, $3$ pages on Nov $3$, and so on. I followed this pattern for the whole month. Altogether, how many pages did I read in November? 
Overseas Competition->Knowledge Point->Word Problem Modules->Page Number Problem
There are in total $30$ days in Nov.  $1+2+3+4+\cdots+30=(1+30)\times30\div2=465$ 