Talk:Digital root

task change?

The task description seems to have changed. It's not entirely clear whether the task has changed.

Based on the initial task description and the initial text on the wikipedia page, this appeared to be a "sum the digits, repeat" task.

However, it now looks like a "mathematically equivalent to sum the digits" task. In other words, divide by 9 and find the remainder.

However, it's also possible (based on the language referred to on the wikipedia page) that we need an equality operation which compares its results modulo 9 (so that 9 equals 0).

That said, it's probably bad practice to define a task by reference to wikipedia. A wikipedia page can easily describe multiple distinct implementations and is expected to change over time.

So... I think that this task should be rephrased to clearly state what the goals are. The wikipedia references should be just references, and the task statement should be clear without them. --Rdm 13:42, 23 July 2012 (UTC)