+0  
 
-1
44
1
avatar+1347 

A rotcaf is the number that results from adding a number and the greatest factor of the number that is less than the number.  For example, the rotcaf of $9$ is $9+3$, or $12$.  What is the sum of the rotcafs of all the numbers from $1$ to $5$?

 Sep 9, 2023
 #1
avatar+129197 
+1

1

2 + 1

3 + 1

4 + 2

5 + 1

 

I'll let you finish

 

cool cool cool

 Sep 9, 2023

2 Online Users

avatar