|____|.....+9.....|
|____|........+11........|
|____|...........+12...........|
|____|...................+15..................|
67-(9+11+12+15)=67-47=20
1+1+1+1=4 (segmente egale)
20:4=5 (valoarea unui segment)
I nr=1×5+9=5+9=14
II nr=1×5+11=5+11=16
III nr=1×5+12=5+12=17
IV nr=1×5+15=5+15=20
verificare :
14+16+17+20=67
Dacă tu crezi că merit, astept coroana!