21 , 42 , 63
The multiples of 3 up to 30 are: 3,6,9,12,15,18,21,24,27,30.The multiples of 5 up to 30 are: 5,10,15,20,25,30.The only common multiples are 15 and 30.The LCM is: 30
21,69
15 and 30
6,12,18 are the common multiples of 3 and 6
The Least Common Multiple (LCM) is 6.
They are: 15, 30, 45, 60.
70, 140, 210
First, we need to fin the LCM of 2, 5, and 7, wich is 70. So that all the multiples of 70 are all common multiples of 2, 5, and 7 such that: 70 x 1 70 x 2 70 x 3 70 x 4 . . .
35, 70, 105
The multiples of 3 up to 30 are: 3,6,9,12,15,18,21,24,27,30.The multiples of 5 up to 30 are: 5,10,15,20,25,30.The only common multiples are 15 and 30.The LCM is: 30
Only one can be least. That's 35. Other common multiples include 70 and 105.
21,69
15,30,45,60,75,90
Use the standard methods to use the LEAST common multiple. Then multiply that by 1, 2, 3, etc., to find additional common multiples.
15 and 30
21 and 42 are.
The first 3 multiples of 7 are: 7, 14, and 21.The first 3 multiples of 14 are: 14, 28, and 42.