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Type: Open-Ended
Category: Primes, Factors, and Multiples
Level: Grade 6
Standards: 6.NS.B.4
Tags: Working with number
Author: nitanjan
Last Modified: 7 years ago

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Primes, Factors, and Multiples Question

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Grade 6 Primes, Factors, and Multiples CCSS: 6.NS.B.4

Lighthouse L has a light which flashes every 12 seconds. Lighthouse M has light which flashes every 10 seconds. The two lights flash together at 2 am. How long will it be before they next flash?