Open Middle®
Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to make a true statement.
Hint
What digits would be a bad choice for the denominator?
What digits would be a good choice for the denominator?
What digits would be a good choice for the denominator?
Answer
There are multiple answers, but here are 2:
1.5 * 4/2 = 3
And 3.5 * 2/1 = 7
Source: Owen Kaplinsky
Also 3.5 times 2/1 equals 6
4.5 x 2/1= 9
1.5 x 8/4 = 3
26 solutions:
1.5 * 4/2 = 3
1.5 * 4/3 = 2
1.5 * 8/2 = 6
1.5 * 8/3 = 4
1.5 * 8/4 = 3
1.5 * 8/6 = 2
1.6 * 5/2 = 4
1.6 * 5/4 = 2
3.5 * 2/1 = 7
3.5 * 2/7 = 1
3.5 * 4/2 = 7
3.5 * 4/7 = 2
3.5 * 8/4 = 7
3.5 * 8/7 = 4
3.6 * 5/2 = 9
3.6 * 5/9 = 2
4.2 * 5/3 = 7
4.2 * 5/7 = 3
4.5 * 2/1 = 9
4.5 * 2/9 = 1
4.5 * 6/3 = 9
4.5 * 6/9 = 3
7.2 * 5/4 = 9
7.2 * 5/9 = 4
8.4 * 5/6 = 7
8.4 * 5/7 = 6