Altered State
Consider the following false equation:
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 100
The task is to make this a correct equation by altering the "punctuation" on the left side.
Only plus and minus signs may be used, but the spacing between the digits can be altered to make larger numbers.
Here is one solution:
123  45  67 + 89 = 100
Find as many other solutions as you can.
Source: Garder, M. (1978). Aha! New York: W.H. Freeman and Company.
Submit your idea for an investigation to InterMath.
