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Earn +20 ptsQ: How do you calculate HCF?
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What is the LCM of 64and 72?
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.
How can you calculate the HCF of 18 and 42?
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.
What is the HCF of 21 14 and 35?
The HCF is 7.
What are the HCF of 45 9 and 8?
The HCF is 1.
What is the HCF of 36 70 and 82?
The HCF is: 2
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