A common denominator, though the least, is 48.
The least common denominator (I think you mean least common multiple) of 2, 8, and 6 is 24. 24 is perfectly divisible by 2, 8, and 6, leaving no remainder in any case.
48
72
120
A common denominator, though the least, is 48.
The least common denominator for fractions with those denominators (11, 8 and 6) is 264.
The least common denominator of 6,7, and 8 is the least common multiple of those numbers. This is 168.
The least common denominator (I think you mean least common multiple) of 2, 8, and 6 is 24. 24 is perfectly divisible by 2, 8, and 6, leaving no remainder in any case.
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions.
24
168
48
72
120
A common denominator of 6, 8 and 10 is 480. This is NOT the least common denominator, though.
120