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Express 84 in terms of its prime factors.

84 = 2 x 2 x 3 x 7 = 22 x 3 x 7

As 12 = 22 x 3, then the remaining factor is 7 so 84 ÷ 12 = 7

As 21 = 3 x 7, then the remaining factors are 22 (= 4) so 84 ÷ 21 = 4

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14y ago

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