There has to be two number genius
The least common multiple of the numbers 1,400 and 420 is 4,200.
350, 700, 1050, 1400, 1750
Any multiple of 700. 700, 1400, 2100 and so on...
They are all multiples.
20, 40 60, 80 and keep adding 20 until you get to 1400.
Those are known as "common multiples". The smallest POSITIVE of these common multiples is called the "least common multiple".
There is an infinite number of common multiples for 7 and 20. 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). The set starts with the multiples 140, 280, 420, 560, 700, 840, 980, 1120, 1260, 1400, and so on
CJ:there are no common multiples for 25
the common multiples are most all of the multiples of 8
All multiples of 840 are common multiples of 60 and 280
The multiples of five that fall between 1,396 and 1,424 are: 1400, 1405, 1410, 1415 and 1420.
uhhhhh