Fifteen. 3, 13, 23, 30, 31, 32, 33*, 34, 35, 36, 37, 38, 39, 43. Note 33 has two threes.
27 threes are in 81
there are a ton of threes and it's 11 3s
There are four threes in a standard deck of cards.
99 / 3 = 33 threes 100/3 = 33.33 threes which rounded would be equal to 33 threes
i
ii
15
4
210
12
35