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+--- Thread: an interesting problem (/thread-9884.html)
an interesting problem - Don Shepherd - 01-09-2018 03:32 AM
Find a number that is all three: a perfect number, a happy number, and a Keith number.
RE: an interesting problem - Paul Dale - 01-09-2018 06:23 AM
My house number qualifies as the required form
Is there a second such number?
Pauli
Twice the alphabet plus four all divided by two.....
RE: an interesting problem - Don Shepherd - 01-09-2018 11:01 AM
(01-09-2018 06:23 AM)Paul Dale Wrote: My house number qualifies as the required form
Is there a second such number?
Pauli
Twice the alphabet plus four all divided by two.....
I knew you would be the one to find it.
Congratulations.
As to a second such number, I don't know, that's an interesting question. I rather doubt it.
RE: an interesting problem - Joe Horn - 01-09-2018 02:31 PM
\[\sum _{ 1 }^{ 7 }{ x } \]