it takes the same 12 stamps to make a dozen :)
It takes 5 machines 5 minutes to make 5 widgets. How long does it take 100 machines to make 100 widgets?
If exactly $3.90 was spent on some 24 cent and some 18 cent stamps, how many of each are there?
Note: There is more than one answer
We have a 100-meter piece of ribbon.
If it takes one second to cut it into a 1-meter strip how long would it take to cut the entire ribbon into 1-meter strips?