Open Middle®
Directions: Using the digits 1 through 9, once each, fill in the blanks so that the statement is true. Can you find more than one?
Hint
What numbers do you think would be too large? What do you think would be too small?
Answer
6C3=20, 7C2=21, 7C5=21, 8C2=28, 8C6=28
Source: Kerri Swails, Mark Alvaro
