Question

determinati ab scis in baza 10 stiind ca ab scis in baza 10=5xb

Answer 1

ab = 10×a+b
10×a+b = 5×b
10×a = 5×b-b
10×a = 4×b |:2
5×a = 2×b
a = 2
b = 5

ab = 25

Verificare:
25 = 5×5
25 = 25