Question

Inmultind un nr cu rasturnatul sau obtin produsul 1458 nr este





dau coroana la cn raspunde primul
.

Answer 1

$\overline{ab} \times \overline{ba} = 1458 \\\bf \underline{rezolvare}: \\ \implies \: b \times a = 8\implies \: 24 \times 42 = 1458 \\ = fals \\ \implies \: b \times a = 8\implies \: \color{lightgreen}\boxed{81 \times 18}\color{a} = 1458 \\ \: \: \: \: \: \: \: \: = adevarat$