Because 210 is the smallest number that both 30 and 42 divide into equally with no remainder.
Chat with our AI personalities
You can find the GCF of two numbers by dividing their product by their LCM. The LCM of 30 and 42 is 210. What is their GCF? 30 x 42 = 1260 divided by 210 = 6 The GCF of 30 and 42 is 6.
The GCF is 42.
The GCF is 6.
The GCF is 6. That makes the LCM 42.
Whenever one number is a multiple of the other, the LCM is the larger number and the GCF is the smaller number. The difference is 42.