Easily test if any number is evenly divisible by 11
Example
Is 2832346 divisible by 11?
Yes
Step 1
Subtract the ones digit from the rest of the number
283234 - 6 = 283228
Step 2
Continue subtracting the ones digit of the answer until the entire number is reduced to a single digit.
28322 - 8 = 28314
2831 - 4 = 2827
282 - 7 = 275
27 - 5 = 22
2 - 2 = 0
Step 3
The original number is evenly divisible by 11 if the result of step 2 is 0.
Yes