Question

Grace collects unique buttons her grandmother gave her three buttons to start her collection she quickly found enough buttons to Triple her collection then over the next year her collection grew eight times larger if her collection continues to double each year after that how many years will it be until she has over 300 buttons in her collection

Answer 1

Year 1. = 9
Year 2 = 9x8=72
Year 3 = 72x2=144
Year 4= 144x2=288

Fourth year she will have more than 300