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Junior Balkan MO
2018 Junior Balkan MO
2
2
Part of
2018 Junior Balkan MO
Problems
(1)
JBMO 2018 P2
Source: JBMO 2018
6/21/2018
Find max number
n
n
n
of numbers of three digits such that : 1. Each has digit sum
9
9
9
2. No one contains digit
0
0
0
3. Each
2
2
2
have different unit digits 4. Each
2
2
2
have different decimal digits 5. Each
2
2
2
have different hundreds digits