Question

Care sunt numerele naturale de trei cifre care au suma cifrelor 12 si cifra sutelor 7?

Answer 1

705

714

723

732

741

750

........

Answer 2

 

$\displaystyle\bf\\Se~da~~\overline{abc}~~cu:\\a+b+c=12\\a=7\\\implies~b+c=12-7=5\\\\\text{Rezulta numerele:}\\\\\boxed{\bf705;~714;~723;~732;~741;~750}$