Answer: 30 If those numbers are denominators, the least common denominator is the least common multiple of the three. In this case, 30 is the LCM of 6, 10 and 15, so 30 is the least common denominator.
120
330
120
LCD(6, 10) = 30.
The least common denominator of 2 and 6 is 6
60 is the least common denominator of 3 4 5 6 10 and 15.
A common denominator of 6, 8 and 10 is 480. This is NOT the least common denominator, though.
120
If that's 5/6 and 10/50, the least common denominator is 150. But since 10/50 = 1/5, the least common denominator is 30.
If 33 and 6 are denominators of fractions then the least common denominator is 66
A common denominator, though not the least one, is 6*4 = 24.