Question 742962
Both of you are correct.  A sequence can have multiple rules as long as the rules make sense. <P>
56 is correct if the rule is "The left number is given, and the right number is the next even number greater than the last right number."<P>
90 is correct if the rule is "this sequence is x on the left and y on the right (of the =) where y=x*(x+1)"<P>