Study the progression: 1, 11, 21, 1211, 111221. Following the established pattern, what is the next numerical term in this sequence?
312211
This is the Look-and-Say sequence, where each term describes the digits of the previous term. Reading '111221' reveals: three 1s, two 2s, and one 1, producing '312211'.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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