Introduction If someone tells you to remember a phone number or address, it can feel like an easy task at first. You repeat the numbers to yourself, either aloud or in your mind. But after just a few ...
A number sequence has gone viral on the internet this week, reading: 2, 6, 12, 20, 30, ?. At first glance, it looks easy, but once people start solving it, they realize spotting the pattern is not so ...
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