Activity 5 Write true if the LCM or GCF is correct and false if not 1.LCM of 3 and 6 is 9. True 2.The GCF of 20 and 10 is 10. True 3.LCM of 6 and 7 is 42. True 4.LCM of 8 and 6 and 4 is 24. True 5.7 is the LCM of 3 and 4.True ​