27 appears more than any number, so it is the mode.
The first three multiples of 12 are 12, 24, and 36.
21, 24, 27, 30, 33, 36, 39.
21, 24, 27, 30, 33, 36, 39.
21, 24, 27, 30, 33, 36, 39.
GCF(27, 30, 36) = 3
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36.
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36.
21, 24, 27, 30, 33, 36, 39.
3 6 9 12 15 18 21 24 27 30 33 36
3 6 9 12 15 18 21 24 27 30 33 36
3+6+9+12+15+18+21+24+27+30+33+36 = 234
the median of 24, 26, 27, 27, 29, 30, 33, 34, 36, is... 29 :)