Every few months, the Internet eats itself over some kind of viral riddle or illusion, each more infuriating than the last. And so, like clockwork, this maddening math problem has gone viral, ...

You don’t have to be a math whiz to know that 4 - 2 + 1 equals 3. Yet I was working with several students recently who said it equals 1. And it wasn’t their fault. Nor was it their teacher’s fault.

Sometimes BODMAS is just PEMDAS by another name. And no, the answer is not 100. By Steven Strogatz Mathematical Twitter is normally a quiet, well-ordered place, a refuge from the aggravations of the ...

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