Japanese teacher to pupils: how long would it take to kill 18 children at a rate of three murders a day?

A Japanese primary school teacher has been reprimanded for giving his pupils a maths problem in which he asked how long it would take to kill 18 children at a rate of three murders a day.

The 45-year-old male teacher, whose name has been withheld, has apologised for giving the quiz to his pupils, aged seven and eight, at his public school in Okazaki, central Japan.

"I did it carelessly. I deeply reflect on my conduct," he was quoted as saying by the officials over the incident in May, which apparently led to a parent complaint to the school in July. More...

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