Debasis Posted March 11, 2013 Report Share Posted March 11, 2013 Use three 9's and arrange them using the mathematical signs to form the number one.There is a subtraction sign. 1 1 Quote Link to comment Share on other sites More sharing options...
0 Utkrisht123 Posted March 11, 2013 Report Share Posted March 11, 2013 99-9 Quote Link to comment Share on other sites More sharing options...
0 BobbyGo Posted March 11, 2013 Report Share Posted March 11, 2013 1 Quote Link to comment Share on other sites More sharing options...
0 Utkrisht123 Posted March 11, 2013 Report Share Posted March 11, 2013 9/99 Quote Link to comment Share on other sites More sharing options...
0 Debasis Posted March 12, 2013 Author Report Share Posted March 12, 2013 (edited) 9/99 did you mean (9/9)^9 if it is then it is correct...There are many possible combinations...i wanted the one with subtraction sign... Edited March 12, 2013 by Debasis Quote Link to comment Share on other sites More sharing options...
0 Perhaps check it again Posted February 2, 2014 Report Share Posted February 2, 2014 (edited) ((9 - 9)9)! = 1 Edited February 25, 2017 by bonanova Tagging as solved since author seems to have left the forum. This gets it off the unsolved list. Quote Link to comment Share on other sites More sharing options...
0 Perhaps check it again Posted February 3, 2014 Report Share Posted February 3, 2014 (9*(9 - 9))! = 1 ((9 - 9)/9)! = 1 I was looking for the square root symbol to do: (9 - sqrt(9*9))! = 1 Quote Link to comment Share on other sites More sharing options...
0 BMAD Posted February 3, 2014 Report Share Posted February 3, 2014 (sqrt(9)*sqrt(9))/9 Quote Link to comment Share on other sites More sharing options...
0 Perhaps check it again Posted February 3, 2014 Report Share Posted February 3, 2014 BMAD, I purposely did not include any solution like yours, because the OP in post # 1 and post # 5 stated that he/she wanted a subtraction sign used among the mathematical signs. Quote Link to comment Share on other sites More sharing options...
1 skca Posted February 4, 2014 Report Share Posted February 4, 2014 9^(9-9)=1 1 Quote Link to comment Share on other sites More sharing options...
0 Perhaps check it again Posted February 6, 2014 Report Share Posted February 6, 2014 The solution given by user skca was already given as its equivalent in post #2 by a different user. Quote Link to comment Share on other sites More sharing options...
0 presidentabrahamlincoln Posted February 25, 2017 Report Share Posted February 25, 2017 9(9 - 9)! = 9 Quote Link to comment Share on other sites More sharing options...
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Debasis
Use three 9's and arrange them using the mathematical signs to form the number one.
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