Every day the three girls Xion, Yea and Ziu line up for dinner. They want to go in a different order each day as they like to confuse the dinner supervisors. How many days can they do this for before they start to repeat the order?
Select one option, then click Submit.
3
6
9
12
27
Select an option, then submit.
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Primary Mathematics Challenge 2000 (2000)
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