Question 2
Compute $1/2+(1/3+2/3)+(1/4+2/4+3/4)+\cdots+(1/10+2/10+\cdots+9/10)$.
IMSO 2006 Mathematics · Taiwan Second Round Short Answer Question 2
IMSO Maths · IMSO 2006 Mathematics · Taiwan Second Round Short Answer
IMSO Maths · IMSO 2006 Mathematics · Taiwan Second Round Short Answer