There is an infinite number of common multiples for 21 and 40. 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).
Multiples of 40 include 40, 80, 120 and so on. For them to be common, they need to be compared to another set of multiples.
LCM of 21 & 49 is 147, so all multiples of 147 are common multiples of 21 & 49.
Multiples of 21 include 21, 42, 63, 84 and so on. For them to be common, they need to be compared to another set of multiples.
there are infinite amount of common multiples.
40 and all its multiples...
They are multiples of 63
Multiples of 21 include 21, 42, 63, 84 and 105. For them to be common, they need to be compared to another set of multiples.
The common multiples of 9 and 21 are 63, 126, 189 and so on.
Two common multiples of 21 and 15 are 105 and 315.
The common multiples of 9 and 21 are 63, 126, 189 and so on.
There is no upper limit to common multiples. LCM of 32 & 40 is 160...
The common multiples of 3 and 21 are 21, 42, 63 and so on.