Assume you are using a basic calculator and press the numbers in the order shown, replacing each question mark with an algebraic sign (+, -, * and /) and each can be used once only. What is the highest whole number you can possibly score for the following problems?
There are more than one way of doing these puzzles and may well be more than one answer. Please let me and others know what alternatives you find by commenting below. We also welcome general comments on the subject and any feedback you’d like to give. If you have a question that need a response from me or you would like to contact me privately, please use the contact form.
Get more puzzles!
If you’ve enjoyed doing the puzzles, consider ordering the book; 150+ of the best puzzles in a handy pocket sized format. Click here for full details.