28 and 56
The least common multiple of 54 and 72 is 216.
It means write down three pairs of numbers that are relatively prime like 4 and 9, 5 and 6, 13 and 25
Let's re-write this. What pair of numbers has 7 as a common factor and 70 as a least common multiple? There are a few answers. One possibility is 14 and 35.
3
The least common multiple, or LCM of two numbers is the first number that can be found that is divisible by both of them. Factoring the numbers: 2 = 2 6 = 2 * 3 Max values of each shared factor are 21 x 31 so the LCM is 6.
Formulas for compounds
They are used to write balanced chemical equations.
I don't have a grid. The LCM is 24.
That is an infinite number; much too long to write down here.
Write out the multiples. 3,6,9,12,15,18,21,24,27,30,33,36,39,42 14,28,42 The LCM is 42.
If you are adding fractions, finding the least common multiple makes the arithmetic easier. For instance if you add 3/4, 5/6 and 1/12 the LCM is 12. In the worst case, you might multiply 4x6x12 to get 288, and have to change each fraction to 288ths!
All sets of numbers have an LCF of 1, so I'll assume you meant to write least common multiple. 6 and 72 have a GCF of 6 and an LCM of 72. So do 18 and 24.