The given number = 7×86038
Sum of the odd places = 8 + 0 + 8 + 7 = 23
Sum of the even places = 3 + 6 + x
(Sum of the odd places) – (Sum of even places) = Number (exactly divisible by 11)
23 – (9 + x) = divisible by 11
14 – x = divisible by 11.
X must be 3, to make given number divisible by 11.