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23-05-2021
Mathematics

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WHAT IS THE HCF OF 21 28 42

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23-05-2021

Answer:

7.

Step-by-step explanation:

21 = 3 * 7

28 = 2 * 2 * 7

42 = 2 * 3 * 7

Collecting common factors:

t is common to all 3 sets of factors so

HCF = 7.

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