A Broken Calculator from Interactive Mathematics Miscellany and Puzzles - 0 views
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In the calculator below only a few buttons are functional at any time. Obviously, the calculator cannot serve its intended general purpose. Instead, the task is to somehow compute the integers from 1 through 15 with the limited means the calculator offers. 15 numbers may be computed in any order. Those already computed will be listed in the space just above the calculator.
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Good puzzle for a KS3 number and calculator lesson -
Interactive Mathematics puzzle from cut the knot.
