Question

how many rectangular prism can you make out of 20 snap of cubes

Answer 1

$20=1\cdot1\cdot20\\20=1\cdot2\cdot10\\20=1\cdot4\cdot5\\20=2\cdot2\cdot5\\\\Answer:4\ regular\ prism\\\\1\ \times\ 1\ \times\ 20\\1\ \times\ 2\ \times\ 10\\1\ \times\ 4\ \times\ 5\\2\ \times\ 2\ \times\ 5$