A man has a stack of blank DVDS. on day one he uses one third of the DVD's. on day 2 he uses half the DVD's that were left from day one. At the end of day 2 there are 12 DVD's left. how many DVD's were in a box at the start of day one?
is the correct answer 72 dvds?
if x = no. of blank dvds at start
no. on day 1 = 1/3 x
no. on day 2 = 1/6x = 12