X 3 7 4 July 8, 2019 16 32 64 128 X 3 7 4 5 X 3 7 4 21 X 3 7 42 X 3 7 4x X 3 4 7 8 X 3 4 7 6 X 7 3 4x 5 3 x 7 )= 45 3 x 7 )= 48 3 x 7 )= 4 2x 1 X 3 4 7 2 X 3 4 7 10 3 x 7 )+ 4 22 X 3 4 7 12 3 x 7 40