Question
There are a total of 20 Mongolian, Japanese and Indian stalls at a hawker center. The number of Mongolian stalls is twice the number of Indian stalls. The number of Indian stalls is thrice the number of Japanese stalls. How many less Japanese than Mongolian stalls are there at the hawker center?
4 m

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There are a total of 20 Mongolian, Japanese and Indian stalls at a hawker center. The number of Mongolian stalls is twice the number of Indian stalls. The number of Indian stalls is thrice the number of Japanese stalls. How many less Japanese than Mongolian stalls are there at the hawker center?