Question
There are a total of 20 Korean, Vietnamese and Mongolian stalls at a food court. The number of Korean stalls is twice the number of Mongolian stalls. The number of Mongolian stalls is thrice the number of Vietnamese stalls. How many more Korean than Mongolian stalls are there at the food court?
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There are a total of 20 Korean, Vietnamese and Mongolian stalls at a food court. The number of Korean stalls is twice the number of Mongolian stalls. The number of Mongolian stalls is thrice the number of Vietnamese stalls. How many more Korean than Mongolian stalls are there at the food court?