Question

Toate numerele naturale de 2 cifre care au suma cifirelor a )2 b)4 c)6 d ) 8

Answer 1

a) 2
Nr sunt: 11 si 20

b) 4
Nr sunt: 13, 22, 31 si 40

c) 6
Nr sunt: 15, 24, 33, 42, 51 si 60

d) 8
Nr sunt: 17, 26, 35, 44, 53, 62, 71 si 80

Answer 2

a). 11, 20

b). 13, 40, 31

c). 15, 51, 60,24,42

d). 17, 71, 80, 62, 26, 53, 35