+0  
 
+6
214
7
avatar+2314 

How many zeroes are at the end of 42!

 

I thought you were supposed to use the dividing by 5 algorithm, but it doesn't work in this case. 

 Mar 25, 2020
 #2
avatar+111456 
+1

Here's  the algorithm :

 

42 / 5  =   8  +  remainder

 

42 /  5^2  =  42 / 25  =   1 + remainder

 

Ignore the remainders.....add the integers.....

 

8 + 1   =  9

 

There  are  9  trailing zeroes  !!!!!

 

 

cool cool cool

 Mar 25, 2020
edited by CPhill  Mar 25, 2020
 #3
avatar+2314 
+1

Ohhhh you use the whole number!!!!! Oops!

 

Thanks so much, Chris!!!!

 Mar 25, 2020
edited by CalTheGreat  Jun 24, 2020

50 Online Users

avatar