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Earn +20 ptsQ: How many pairs of factors of 21600 have their HCF as 45?
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How do you work out the hcf of 210 and 385?
Prime factors of 210 are: 2, 3, 5 and 7 Prime factors of 385 are: 5,7 and 11 Common factors are: 5 and 7 and so 5*7 = 35 which is the hcf
What are three pairs of numbers that have a LCM of 30 and a HCF of 1?
30 & 1. 15 & 2. 10 & 3.
What are the highest common factors of 110 and 250?
The GCF is 10.
What 2 numbers have LCM of 20 and HCF of 2?
2 and 20 have an HCF of 2 and an LCM of 20. You could also use 4 and 10.
Why is 1 the HCF of 9 and 13?
The greatest common factor of 9 and 13 is 1 because 13 is a prime number which has only two factors, itself and one. So it follows that the HCF of 9 and 13 is 1
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