



 
Morgan, To get a 0 on the end of your product you need to multiply a 2 and a 5. There are a lot more 2's in your product than 5's so you need only count how many 5's there are that can be paired up with a 2. There's a 5 in the 5, a 5 in the 10, ... . Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 