Open Middle®
Directions: Using the digits 1 to 9 at most one time each, fill in the boxes to make the difference equal to 39.
Hint
What must be true in order to get a 9 in the one’s place of your difference?
Answer
52-13, 53-14, 56-17, 63-24, 64-25, 67-28, 68-29, 71-32, 74-35, 75-36, 78-39, 81-42, 82-43, 85-46, 86-47, 87-48, 91-52, 92-53, 93-54, 96-57, 97-58, 98-59
Source: Chris Ignaciuk
52-13=39
69-30=39
zero is not available.
80-41=39
60-21=39
71-32=39
93-54=39
I did 81-42=39 78-39=39 63-24=39
59-20=39
49-10
79-40=39
52-13=39
52-13,53-14,56-17,63-24,64-25,67-28,68-29,71-32,74-35,75-36,78-39,81-42,82-43,82-43,85-46,86-47,87-48,91-52,92-53,93-54,96-57,97-58,98-59
68-29=39, 78-39=39, 98-59=39
89-20=69 69-20=49 49-10=39
52
-13
___
39
52-13=39
58-19=39
100-61=39
60-21=39