Open Middle®
Directions: Using the digits 0 to 9 at most one time each, place a digit in each box to create a true equation.
Hint
1) First list all the 2-digit squares and then make a systemic trial and error method to identify the right combination
2) Start with the larger squares
2) Start with the larger squares
Answer
There is more than one potential answer e.g. sqrt(36) – sqrt(25) = 1
Source: Jos Bertemes
There are exactly 6 solutions. In three family pairs. (Where 12-11 = 1 is considered in the same family as 12-1=11). Does anyone have an idea of how to expand and generalize this problem?
I love it. I would like to try it.