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To find the HCH write down all the factors of each number.

Hence#

70 ; 1,2,5,7,10,14, 35 & 70.

98 ; 1,2,7,7,14, 49 & 98

The factors common to both numbers are 2,7,14

Hence '14' is the HCF.

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lenpollock

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11y ago
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Q: What is the HCF of 70 and 98?
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