The Highest Common Factor (HCF) of 85 and 200 is 5. To find the HCF, you would identify the prime factors of each number: 85 = 5 x 17 and 200 = 2^3 x 5^2. Then, you would take the common prime factors of the two numbers, which in this case is 5 raised to the power of 1. Therefore, the HCF of 85 and 200 is 5.
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HCF: 5
17
To find out what you need to add to 85 to reach 200, you subtract 85 from 200. This calculation gives you 200 - 85 = 115. Therefore, you need to add 115 to 85 to get to 200.
The GCF is 8.
Their HCF which is 10