I was back HOME to Nagoya to see my sister and her family members. One of my nephews was struggling with a math problem, for which I was asked a help. It was a bit tough one and I needed to spent an afternoon pondering upon its solution. I was glad to have found a solution by myself, but I would have been failed if I was examined for entering a high school. I told him this was a sort of game in which you compete for speed. It means you do not have time to think in front of the problems. It is just like tongue twister.