deletions | additions       diff --git a/Question 3.md b/Question 3.md  index 811d4eb..01d335d 100644  --- a/Question 3.md  +++ b/Question 3.md 
...
__Question 3__ 
 
  On arc-consistency:  > \(X_{i}\) is arc-consistent with respect to another variable \(X_{j}\) if for every value in the current domain \(D_{i}\) there is some value in the domain \(D_{j}\) that satisfies the binary constraint on the arc (\(X_{i}, X_{j}\))