If 12 is the third of 6 consecutive numbers:

First consecutive number is 12 - 2 = 10

Second consecutive number = 12 - 1 = 11

Third consecutive number = 12

Fourth consecutive number = 12 + 1 = 13

Fifth consecutive number = 13 + 1 = 14

Sixth consecutive number = 14 + 1 = 15

The sum of all consecutive numbers is:

10 + 11 + 12 + 13 + 14 + 15 =

**75**