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The LCD of any set of numbers is always 1.
the Least common dvisor as a whole number is 1
factoring
18=1*2*3*3
63=1*3*3*7
if you want the next LCD other than 1, it would be 3
288
LCD(20, 6) = 60
LCD(5, 18) = 90
224
It is: 18
LCD(2, 8, 32) = 32.
LCD(32, 40) = 160
Grundig of course
32
lcd of 18 and 16 = 144
LCD(18, 21) = 126
64
96