3 9 27 81 series July 8, 2019 16 32 64 128 Number series 3 9 27 81 Complete the series 3 9 27 81 Look at the series 3 9 27 81 what number should come next Complete the following series 3 9 27 81 3 9 27 81 sequence 3 9 27 81 next number 81 27 9 3 what is the next