SOLUTION: Only the 1, +, -, X, /, (, ) and = keys on a scientific calculator are working. How can a result of 75 be reached by pushing these keys less than 20 times?

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Question 497191: Only the 1, +, -, X, /, (, ) and = keys on a scientific calculator are working. How can a result of 75 be reached by pushing these keys less than 20 times?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
1+1 = 2, multiply that by 1+1. I'm pretty sure you can repeat functions by repeatedly pressing =, so you can get 2, 4, 8, 16. Subtract 1 to get 15. Multiply by 1+1+1+1+1 to get 75.

There's probably a faster way to do this, and one that requires less than 20 keystrokes. Try it and see.