+0  
 
0
104
7
avatar+1956 

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+111321 
+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+1956 
+1

Ohhhh you use the whole number!!!!! ARRRRGGGG I'M SO DUMB XD

 

Thanks so much, Chris!!!!

 Mar 25, 2020

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