Question

Afla suma nr. de forma 1ab,stiind ca ab+ba =55

Answer 1

ab+ba=55
10a+b+10b+a=55
11a+11b=55
11(a+b)=55
a+b=5
a si b diferite de 0
=> a=1 => b=4
a=2 => b=3
a=3 => b=2
a=4 => b=1
Nr de forma 1ab:
114,123,132,141