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Can you bring the number 100 on the calculator display screen with honoring three important rules:
Rule1: Memory keys are not allowed.
Rule2: It should be the basic calculator.
Rule3: Only three unique buttons are allowed.
There are multiple solutions to do so.
Press / (divide)
Press % (percent)
Press / (divide) .... this step may not require in all calculator.
Note: Three unique keys are '1', '/' and '%'
Solution2 :(My favorite)
Note: Three unique keys are '1', '0' and '='