There is an infinite number of common multiples for 2 and 7. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder). However, the least or lowest common multiple (LCM) of 2 and 7 is 14.
The common multiples of 2 and 7 are 14, 28, 42, 56, 70, 84, 98, and so on.
14,28,42,56,70...
42
lcm(2, 7) = 14 → first 3 common multiples are: 14, 28, 42; lcm(2, 8) = 8 → first 3 common multiples are: 8, 16, 24; lcm(7, 8) = 56 → first 3 common multiples are: 56, 112, 168; lcm(2, 7, 8) = 56 → first 3 common multiples are: 56, 112, 168.
The first 2 multiples are 42,84.
14 = 2 X 7 42 = 2 X 3 X 7 So 2 & 7 are common to both multiples / NB '3' is NOT a common multiple.
2
28 and 56
Any multiple of 14.
Every multiple of 14 !
The LCM is 42.
14, 28, 42