perplexus.info :: Numbers : That's a lotta numbers!

That's a lotta numbers! (Posted on 2006-04-14)

Consider all nine-digit numbers consisting of one each of the digits 1 through 9.

What is the sum of these numbers?

Submitted by Jer

Rating: 3.2500 (4 votes)

Solution: (Hide)

Each number appears in each position 8! times. 1+2+...+9=45 so the solution is 45*111111111*8!= 201599999798400

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
That's a lotta numbers	hugh	2006-04-19 00:06:14
I think	Tim	2006-04-17 01:14:25
re: Another Viewpoint	K Sengupta	2006-04-15 20:38:06
A solution	Dej Mar	2006-04-15 06:14:30
Another Viewpoint	Richard	2006-04-14 15:57:23
re: Is this it? -- computer verification	Charlie	2006-04-14 15:03:32
Generalised Result: Detailed Solution Not Given	K Sengupta	2006-04-14 12:28:12
The Solution	K Sengupta	2006-04-14 12:19:36
Is this it?	tomarken	2006-04-14 11:49:48
Some Hints For Solving The Problem	K Sengupta	2006-04-14 09:45:40

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