an interesting problem
01-09-2018, 03:32 AM
Post: #1
 Don Shepherd Senior Member Posts: 745 Joined: Dec 2013
an interesting problem
Find a number that is all three: a perfect number, a happy number, and a Keith number.
01-09-2018, 06:23 AM
Post: #2
 Paul Dale Senior Member Posts: 1,725 Joined: Dec 2013
RE: an interesting problem
My house number qualifies as the required form
Is there a second such number?

Pauli

Twice the alphabet plus four all divided by two.....
01-09-2018, 11:01 AM
Post: #3
 Don Shepherd Senior Member Posts: 745 Joined: Dec 2013
RE: an interesting problem
(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.
01-09-2018, 02:31 PM
Post: #4
 Joe Horn Senior Member Posts: 1,773 Joined: Dec 2013
RE: an interesting problem
$\sum _{ 1 }^{ 7 }{ x }$

<0|ΙΈ|0>
-Joe-
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