HCF stands for the Highest Common Factor. To determine this, you find the highest number possible that can be divide each of the two numbers in a fraction.
To calculate the LCM, you first have to split the numbers up into their prime factors: 64 = 2x2x2x2x2x2 72 = 2x2x2x3x3 The next step is to calculate the HCF. In this case it will be 2x2x2 = 8. Finally, you multiply the two numbers and divide by the HCF: 64x72/8 = 576 And therefore the LCM of 64 and 72 is 576.
List the prime factors of each. 18 = 2 x 3 x 3, 42 = 2 x 3 x 7 Common factors are 2 and 3 so HCF = 6.
HCF(10, 84) = 2 HCF(10, 84) = 2 HCF(10, 84) = 2 HCF(10, 84) = 2
The HCF is: 2
The HCF is 1.
21
12
To calculate the LCM, you first have to split the numbers up into their prime factors: 64 = 2x2x2x2x2x2 72 = 2x2x2x3x3 The next step is to calculate the HCF. In this case it will be 2x2x2 = 8. Finally, you multiply the two numbers and divide by the HCF: 64x72/8 = 576 And therefore the LCM of 64 and 72 is 576.
List the prime factors of each. 18 = 2 x 3 x 3, 42 = 2 x 3 x 7 Common factors are 2 and 3 so HCF = 6.
To have a HCF, you need at least 2 numbers. There is no HCF in just 1 number.
The HCF is 5.
the HCF is 6
The HCF is 1
HCF = 14
The HCF of 228 and 240 is 12.
The HCF of 16 & 33 is... 1
HCF(10, 84) = 2 HCF(10, 84) = 2 HCF(10, 84) = 2 HCF(10, 84) = 2