Ответы и объяснения

2014-02-11T21:50:55+04:00
1950.....................................................................
2014-02-11T21:51:57+04:00
6,12,18,24,30,36,42,48,54,60,66,72,78,84,90,96,102,108,114,120,126,132,138,142,148