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scrieți toate nr cunoscute care au cifra zecilor 2

Răspuns :

20,21,22,23,24,25,26,27,28,29,120,121,122,123,124,125,126,127,128,129,1521,1522,1523,1524,etc
20,21,22,23,24,25,26,27,28,29..
120,121,122,123,124,125,126,127,128,129 etc etc