4 6 9 13.5 series July 8, 2019 16 32 64 128 Complete the series 4 6 9 13.5 Complete the following series 4 6 9 13.5 Look at this series 4 6 9 13.5 what number should fill the blank 13.5 - 4 13.5 - 6 13.5 - 9
