Next number= 27 X 3 = 81.
81
For each term, multiply the previous by -3. So, 27*-3=-81. -81 is the next term.
It is 3 times 81 = 243
135 25235235235 235235
27
27
-27 You subtract powers of 2 everytime... 1,2,4,8,16
3396.
The numbers are being divided by one third each time. therefore, after 1 comes 1/3 or one third.
11 13 15 17 19 21 23 25 27
3, 1, 1/3