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## Main Question or Discussion Point

I have seen this number "trick" throughout the years and have never been able to figure out the mechanism. I'm sure most of you are familiar with it, and probably have a simple solution. Here it is for those who are not aware:

take any number greater than 9

add up all of the digits of this number

subtract the sum from the original number

simplify this number by adding the digits until you get down to a single digit...it will ALWAYS be 9

example:

384773

3+8+4+7+7+3 = 32

384773-32 = 384741

3+8+4+7+4+1 = 27

2+7 = 9

Anyone know what's going on here?

take any number greater than 9

add up all of the digits of this number

subtract the sum from the original number

simplify this number by adding the digits until you get down to a single digit...it will ALWAYS be 9

example:

384773

3+8+4+7+7+3 = 32

384773-32 = 384741

3+8+4+7+4+1 = 27

2+7 = 9

Anyone know what's going on here?

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