Question
There are a total of 30 Greek, Korean and Mongolian stalls at a food court. The number of Greek stalls is twice the number of Mongolian stalls. The number of Mongolian stalls is thrice the number of Korean stalls. How many more Greek than Mongolian stalls are there at the food court?
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There are a total of 30 Greek, Korean and Mongolian stalls at a food court. The number of Greek stalls is twice the number of Mongolian stalls. The number of Mongolian stalls is thrice the number of Korean stalls. How many more Greek than Mongolian stalls are there at the food court?