I am completing an assignment and had to look for patterns with the number 11.
I now need to prove 2 of my findings but can't can you help please.
If I have the number 81752 I know that 8+7+2 -1+5 = 11 so its divisible by 11.
How do I prove this using albebra
Also if I take the same number now I know its divisible by 11 and
8175-2=
8173
817-3=
814
81-4=
77 = 7x11 so 7 and the numbers I subtracted being 4,3,2, means 7432x11=81752
How do I prove this?