Question

Afla nr de forma a6b care au suma cifrelor 15

Answer 1

168
267
366
465
564
663
762
861
960
Coroana?

Answer 2

a6b= a=2,3,4,5,6,7,8     b=7,6,5,4,3,2,1  267-2+6+7=8+7=15  366-3+6+6=9+6=15  465-4+6+5=10+5=15 564-5+6+4=11+4=15  663-6+6+3=12+3=15 762-7+6+2=13+2=15 861-8+6+1=14+1=15