Răspunsuri

2014-06-02T19:08:28+03:00
Abcd=dcba    doar daca a=d, c=b
9009, 9119, 9229, 9339, ........9999
8008, 8118, 8228, 8338, .......8998
7007, 7117, 7227,7337, ........7997
6006, 6116, 6226, 6336, .......6996
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1001, 1111, 1221, 1331,.......1991
In total sunt 90 de numere