Mrs. snyder is buying pencils and erasers at the store before the school year starts. pencils come in
packs of 12 and the erasers come in packs of 20.
mrs. snyder wants to buy the same number of pencils and erasers for her class.
what is the smallest amount of each that she would need to buy?

say if u r using lcm or gcf?
(can u plz do the ladder form? ) u