Open Middle®
Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to create a true equation.
Hint
What must divide out to give the simplified expression on the right?
Answer
There are 60 known solutions for this problem if the problem is written as (Ax^2 + Bx)/(Cx + D) = Ex/F.
With the format (A, B, C, D, E, F), some of the solutions are:
(1, 3, 2, 6, 4, 8)
(1, 4, 2, 8, 3, 6)
(2, 6, 1, 3, 8, 4)
(2, 8, 1, 4, 6, 3)
Along with many more solutions.
Source: Eduardo Bernal