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Ahah, that's alright, and thank you! I was thinking that some questions would get tough enough that using a calculator on side would be suggested. So definitely not cheating. :)

I completely agree with idea of attaching a simple story to it if I were to expand it. I actually had a longer title in mind that would've have implied the possible story.

If you do ever want to prevent (or at least neutralize) calculators then you could add more puzzling maths problems, like equations/algebra. Traditional calculators don't really help with those, even though graph-calculators (Texas Instruments et. al.) do.

I would have loved to include algebra! I really only have the arithmetic question system written down so far though. It probably wouldn't take that long except probably adjusting the difficulties for them.