Biology, 21.02.2021 23:10 carriecarl3530

Sumaya is using two different strings of Christmas lights to decorate her house. one string flashes every 10 seconds. the other one string flashes every 15 seconds. when Sumaya turns on the lights they flashes at the same time. work out how long it will be before they flash again at the same time. use the LCM to help you work out your answer

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