Sequence

Question: What is the next sequence of numbers and why? 1 11 21 1211 111221 312211

Riddle Discussion

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The Tide (medium)

By Fred

Question: At low tide 14 rungs of a ship are above the water, the rungs are 15 centimeters apart. each 15 mins the water rises 15 centimeters. after 2 hours and 30 mins how many rungs are above the water?