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02 Aug 2010 @ 11:15 AM
Write down digits 1 to 9, in order. Add between them math operators (you decide which and where) to get an expression equal with 1234, 2345, 3456, 4567, 5678, 6789, 7890. (for each number is a separate expression)
You can use ANY math operators.
Example: 1^2+3*4+56+7*8-9=1+12+56+56-9=116 In this case using digits 1 to 9 the result is 116.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 1234 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 2345 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 3456 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 4567 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 5678 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 6789 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | = | 7890 |
The solutions for this exercise, even partial ones can be posted in the comments.
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