India, Sept. 6 -- 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 straightforward. The sequence looks familiar. Your brain immediately tries to apply simple arithmetic or geometric rules, and that is where it tricks you. The key here is to remain focused and keep trying out until you get the correct answer.

Start by checking the differences between consecutive numbers. Look at each pair. Ask yourself: how does one number lead to the next? At first, you might think "add a constant." But here, the differences themselves grow steadily. Slowing down and working step-by-step is the only way to...