I am sure you knew the answer to this at some point in your life. Specifically, when you were in school. If you still remember it - I congratulate you. I did not.
I am sure there must be many such apparently trivial questions that we should know the answers to, knew the answers to at some time, but don't anymore.
So this is what I propose. I will email you one such question with a short, crisp answer 2 times per week.
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