LCM for 20 and 30 is 60.
The LCM is: 90
120
150
The LCM is: 150
21,22,23,24,25,26,27,28,29
The Least Common Multiple (LCM) for 40 30 is 120.
Including 20 and 30 there are ten of them
A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.
The prime numbers between 20 and 30 are 23 and 29.
The LCM of 20 and 20 is 20.
The LCM of 4 and 5 is 20.
The LCM is: 20