etudes posts

13-November-2020 Friday
Friday the thirteenth

Mathematics Friday

26-June-2018 Tuesday
Soccer ball: mirror classic

Soccer ball: mirror classic - My, Football, Ball, Mathematics, icosahedron

icosahedron Mathematics Ball Football

27-December-2016 Tuesday
Cyclic calendars: Julian vs Gregorian

Cyclic calendars: Julian vs Gregorian - My, , Julian calendar, Gregorian calendar

Gregorian calendar Циклические календари Julian calendar

02-January-2016 Saturday
How much has been drunk?

Question Books Mathematics New Year

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