Школьные задачи
17-April-2017 Monday
No exit
05-January-2017 Thursday
To the league of physicists
24-October-2016 Monday
military mystery
20-October-2016 Thursday
If you don't solve the problem, you won't go to school
30-October-2014 Thursday
Task for first grade
23-March-2014 Sunday
Fun puzzle...
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