Can you find the next number in this sequence? – Alex Gendler

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1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? Alex Gendler reveals the answer and explains how beyond just being a neat puzzle, this type of sequence has practical applications as well.

Lesson by Alex Gendler, directed by Artrake Studio.