pictogram

Mar 2010
32
0
Please help to solve the problem attached here with

With thanks

Alan
 

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MHF Hall of Honor
Mar 2010
2,340
821
Chicago
Please help to solve the problem attached here with

With thanks

Alan
Well it's simple if you understand what O and o mean, so for example

1 -> o
2 -> o
...
9 -> o
10 -> O
11 -> Oo
12 -> Oo
...
19 -> Oo
20 -> OO
21 -> OOo
22 -> OOo
...

See how it works?