A 5 4 3 1 July 8, 2019 16 32 64 128 A 2 5 4 3 1 2 5 4 3 16 5 4 3 10 5 4 3 12 5 4 3 11 5 4 3 15 5 4 3 1 7 5 4 3 1 8 5 4 3 10 as a fraction A 1 2 3 4 5 6 A - 4 = 5