Because 30 is the smallest number that both 10 and 15 can divide into evenly with no remainder.
10
1,2,5 and 10
Good old LCMs! 1/6 = 5/30, 3/10 = 9/30 so the answer is -4/30 ie -2/15
The LCM of 30 and 75 is 150.
10, 20, 30, 40, 50, 60.
10- 10, 20, 30, 40, 50, 60, 70 ect..
The LCM of these numbers is 1260. LCM is Least Common Multiple.
40 is the outlier of10 15 10 20 10 20 40
Since 15 is a factor of 90, it is automatically the GCF. Since 90 is a multiple of 15, it is automatically the LCM.
Southern District - LCMS - was created in 1882.
Ohio District - LCMS - was created in 1963.
Nebraska District - LCMS - was created in 1970.