1+6=7
2+5=7
3+4=7
7+0=7
Numerele:1076, 1256, 1346, 1436, 1526, 1706, 2075, 2165, 2345, 2435, 2615, 2705, 3074, 3164, 3254, 3524, 3614, 3704, , 4073, 4163, 4253, 4523, 4613, 4703, 5072, 5162, 5342, 5432, 5612, 5702, 6071, 6251, 6341, 6431, 6521, 6701, 7160, 7250, 7340, 7430, 7520, 7610.