Open Middle®
Directions: Using the digits 0 to 9, at most one time each, place a digit in each box to make the equation true.
Hint
Where do you think you could use the 0?
Answer
2/10 + 3/10 + 5/10 + 10/100
1/10 + 3/10 + 5/10 + 20/100
1/10 + 2/10 + 5/10 + 30/100
1/10 + 2/10 + 3/10 + 50/100
1/10 + 3/10 + 5/10 + 20/100
1/10 + 2/10 + 5/10 + 30/100
1/10 + 2/10 + 3/10 + 50/100
Source: Christine Jenkins
3/10+3/10+3/10+40/100=1 1/10
You can’t do that because you can only use each number 0 – 9 once.
Another way of thinking about this problem is: What 4 unique natural numbers add to 11? There is only one solution: 1, 2, 3, 5. Because of this, I feel like the problem doesn’t really belong on Open Middle. However, perhaps I am wrong. I wonder how the problem could be tweaked to make it more open-ended.
SUS
i like SUS
stop jerry
no get away
8 2 01