Question 822346
 Two cousins visited Jane today.  One cousin visits every 42 days.  The other visits every 429 days.  They will next visit on the same day in  ( ? )  days
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It's the LCM (Least Common Multiple) of 42 & 429.
The only common factor is 3
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--> 2*3*7*11*13 days
= 6006 days