Úloha ID 1810 - 
Po doplnění jednoho dílku z možností k pěti dílkům v zadání je možné vytvořit čtverec. Přičemž musíme dodržet dvě pravidla: tečka na dílku bude položena uprostřed čtverce a zobrazené dílky smíme pouze přesouvat (tedy nepřevracet ani neotáčet).
Který z dílků a) až e) použijeme k sestavení kompletního čtverce?
Správná odpověď je: B
Když položíme díl 1, můžeme s jistotou umístit i díly 2 a 3. Na jiných místech by totiž vytvořily díru o velikosti jednoho dílku. Díly 4 a poté 5 lze následně též jednoznačně umístit.
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