Arrange the digits 1,2,3,4,5,6,7,8,9 in order from left to right, insert + and – as desired to get 79 ?
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1+2+3+4+5+ 6+7+8+9+1+2+3+4+5+6+7-8+9+1+2-3-4-5+6+7-8+9 =79
Mat , well done. How long did it take you?
I had a different solution in mind.
If anyone can find 10 solutions, that person will also get a free app.
And which app would you like?
1-2+34+56+7-8-9 another one 🙂
It takes 5-10mins 🙂
Huh 10 solutions is possible?
I want to test Calculus with my TI-89 Tit 🙂
Sure it is. Write a little program that finds those. Email us At email@example.com please.
I think that’s would be ok? 😀
How you calculate how many possible combination are in this problem? with formul ? 😀
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