To calculate the Highest Common Factor (HCF) of 28, 14, and 21, we first find the factors of each number:
7
The GCF is 14.
84 and 14, respectively.
The LCM is: 84
The greatest (highest) common factor of 28 and 42 is 14.The GCF is 14.
7
The GCF is 14.
The least common multiple of 14 and 21 is 42.14, 28, 42, 56 ...21, 42, 63, 84, ...
The GCF is 28.
The GCF is 28.
First you express the numbers as the product of their prime factors: 28 = 2x2x7 21 = 3x7 Next you find the HCF. In this case, the HCF is 7. Finally, you multiply the numbers together and divide by the HCF. 28x21/7 = 84 Therefore the LCM of 28 and 21 is 84.
84 and 14, respectively.
The Highest Common Factor is 14
GCF(14, 28, 21) = 7
The GCF is 2.
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84.
The LCM is: 84