What's are the next two numbers in this sequence? (The mathematically strong will struggle with this puzzle but once you figure out how to get the first number the second will be easy.)
1, 11, 21, 1211, 111221, 312211...
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A Riddle a Day -- 78 Logical and Mathematical Puzzles
RandomSome riddles and brainteasers to give you a little something to think about each day!
