Kenneth S. answered 09/13/17
Tutor
4.8
(62)
Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
81 ... there's no other possibility...if units position were 0, 8 times that would still be zero, for the tens digit.
if units position were 2 or more, 8 times that would be a two digit value attempting to fit into the tens position.
"Zero is not one of my digits" is an unnecessary statement, BTW.