perplexus.info :: Just Math : Some sum sod settlement

Some sum sod settlement (Posted on 2011-02-15)

N is a positive base ten integer satisfying:

sod(N) + sod(sod(N)) + sod(sod(sod(N))) = 2007.

where, sod(N) denotes the sum of digits of N.

Determine the minimum value of N.

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

a simple string

| Comment 1 of 4

N MUST BE 0 MOD 9

So:

A string of 1980/9=220 nines looks like the minimal solution:

1980+18+9=2007

Posted by Ady TZIDON on 2011-02-15 12:41:47

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