2006 Cyprus MO/Lyceum/Problem 13
Problem
The sum of the digits of the number is
Solution
is a followed by 2006 's. When we subtract , we will get something close to 2006 's.
The last four digits are , and so we have 2002 s followed by .
The sum of these is
See also
2006 Cyprus MO, Lyceum (Problems) | ||
Preceded by Problem 12 |
Followed by Problem 14 | |
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