Question
Oscar, Dylan and Riordan had a total of $81. Dylan had twice as much money as Oscar. Riordan had thrice as much money as Dylan. How much more money did Riordan have than Dylan?
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Oscar, Dylan and Riordan had a total of $81. Dylan had twice as much money as Oscar. Riordan had thrice as much money as Dylan. How much more money did Riordan have than Dylan?