1/3 of the cookies are butter cookies. 1/6 of the cookies are iced sugar cookies. 3/8 of the cookies are chocolate chip cookies. The rest of the cookies are oatmeal cookies. How many cookies are oatmeal cookies?

Answer 1

The total fraction of cookies that are either butter cookies, iced sugar cookies, or chocolate chip cookies is 1/3 + 1/6 + 3/8 = 4/8 + 2/8 + 3/8 = 9/8
The remaining fraction of cookies that are oatmeal cookies is 8/8 - 9/8 = 1/8 of the total number of cookies.
Since 1/8 is the remaining fraction, that means there are 1/8 * n = <<1/8=0.125>>0.125n oatmeal cookies.
Thus, there are 0.125n = <<0.125=12.5>>12.5 oatmeal cookies out of n cookies.
Since the number of cookies must be a whole number, the nearest whole number close to 12.5 is 13, so there are 13 oatmeal cookies. Answer: \boxed{13}.