Ecco le risposte ai problemini di sabato scorso!<\/p>\n
1. 2022 in ordine<\/b><\/big><\/p>\n
Ecco una possibile soluzione:<\/p>\n
0: 2 × 0 × 2 × 2
\n1: 2 × 0 + 2 : 2
\n2: 2 + 0 × 2 × 2
\n3: 2 + 0 + 2 : 2
\n6: 2 + 0 + 2 + 2
\n7: 2 \/ 0.(2) – 2 oppure 2 + 0! + 2 + 2
\n4: 2 × 0 + 2 + 2
\n5: 20 : 2 : 2
\n8: (2 + 0) × 2 × 2
\n9: (20-2)\/2 oppure 20 : 2.(2) oppure (2^0 + 2)^2<\/p>\n
2. Poche cifre<\/b><\/big><\/p>\n
Bastano cinque cifre. Infatti 9×8×7×4+6 = 2022.<\/p>\n
3. Conto alla rovescia per il 2022<\/b><\/big><\/p>\n
La soluzione che conosco io \u00e8 9+8\u00d77\u00d76\u00d7(5+4\u22123)\u22122\u22121+0=2022 . Magari ce ne sono delle altre…<\/p>\n
4. Numeri reversibili<\/b><\/big><\/p>\n
Una possibile soluzione \u00e8 <\/p>\n
11 − 101 + 2112 = 2022 ; 2202 = 2112 + 101 − 11 <\/p>\n
5. Una lunga fila<\/b><\/big><\/p>\n
Consideriamo la prima persona in fila: non avendo nessuno davanti a lui non pu\u00f2 avere pi\u00f9 furfanti davanti che cavalieri dietro, quindi mente e pertanto \u00e8 un furfante. L’ultima persona della fila ha sicuramente almeno un furfante davanti a lui e non ha cavalieri dietro, quindi dice la verit\u00e0 e pertanto \u00e8 un cavaliere. Prendiamo ora il secondo della fila. Ha un solo furfante davanti e almeno un cavaliere dietro; quindi mente ed \u00e8 un furfante. Il penultimo della fila, che ha almeno due furfanti davanti e un solo cavaliere dietro, dice la verit\u00e0 ed \u00e8 un cavaliere. Continuando cos\u00ec, abbiamo che i cavalieri sono esattamente la met\u00e0 delle persone, cio\u00e8 1011. <\/p>\n","protected":false},"excerpt":{"rendered":"
Ecco le risposte ai problemini di sabato scorso! 1. 2022 in ordine Ecco una possibile soluzione: 0: 2 × 0 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