16 5 15 3 July 8, 2019 16 32 64 128 15 16 5 8 x 3 4 5 16 vs 15 32 16 5 2 15 by 33 16 5 2 15 chia hết cho 33 5 16 x 4 15 x 3 14 5 16 times 4 15 times 3 14 5 15 16 divided by 3 3 16 times 5 15