I can multiply any three-digit number by 1667 in my head, usually in less than 10 seconds.

Also, to make it even more impressive, I come up with the digits of the result in proper order (not in reverse!)

How can I do this?

Hi - I am unfamiliar with the site processes. Are they set out somewhere?

Others have made attempts at solutions, and I have enjoyed watching their thought processes.
I am uncertain whether they will have seen my solution. How do they see this?

Posted by nellie on 2003-10-15 13:23:50