Question

cate numere naturale de forma abcabcau suma cifrelor egala cu 6? dau coroana

Answer 1

$\overline{abcabc}$

$2a + 2b + 2c = 6 \: | \div 2$

$a + b + c = 3$

$1 + 0 + 2 = 3$

$1 + 2 + 0 = 3$

$2 + 0 + 1 = 3$

$2 + 1 + 0 = 3$

Numerele sunt :

*102 102,102 120,102 201,102 210
*120 102,120 120,120 201,120 210
*201 102,201 120,201 201,201 210
*210 102,210 120,210 201,210 210

=>16 numere