The GCF is 21.
The GCF is 7.
It is: 21
The GCF is 21.
The GCF is 21.
It is 1 but the HCF is 21
The hcf is 21
What is the h c f of 51 63 and 21
First you need to break the numbers into their prime factors. In this case we get: 63 = 3x3x7 21 = 3x7 The next step is to identify any common prime factors. In this case both have a 3 and a 7 as prime factors. Multiply these together and you get 3x7 = 21. This is the HCF. To find the LCM you just multiply the numbers together and divide by the HCF. 63x21/21 = 63 Thus 63 is the LCM.
HCF(40, 63) = 1
The GCF is 9.
21. 63 = 32 x 7 84 = 22 x 3 x 7 hcf = 3 x 7 = 21