Open Middle®
Directions: Using the digits 0 to 9, at most once each time, fill in blanks to create a set of 4 points that create either parallel or perpendicular lines, depending on how you connect them.
( ___, ___ ) ( ___, ___ ) ( ___, ___ ) ( ___, ___ )
Hint
What makes lines either parallel or perpendicular?
What is that relationship?
Answer
There are various possible answers, one is:
(3,0) (2,4) (6,5) (7,1)
(3,0) (2,4) (6,5) (7,1)
Source: Bryan Anderson
(5,5) (5,10) (7,5) (7,10)
(5,5) (6,10) (4,5) (7,10)
(6, 14) (6,10) (8, 13) (8,11)
(1,3) (8,9) (0,7) (5,2) Perpendicular.
(5,5) (6,6) (4,7) (7,4)
Interesting how all responders seem to skip the word “most”. The content of the question changes a lot, and therefore a possible answer as well.