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S.o.d . of s.o.d ,,, (
Posted on 20120221
)
Given a 2011 digit number, divisible by 9.
Let x be the sum of its digits and y the sum of the digits of x.
Find z, sum of the digits of y .
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Submitted by
Ady TZIDON
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maximum value of y
 Comment 3 of 4 
x, as previously noted, is between 9 and 18099
y, however, can be as high as 36, if x = 9999. Previous posts do not mention any y values greater than 27.
This does not change z, which still must be 9.
Posted by
Steve Herman
on 20120221 18:06:21
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