630, 180, 60, 24, 12, 8, 5
ATQ, 630 ÷ 3.5 = 180 180 ÷ 3 = 60 60 ÷ 2.5 = 24 24 ÷ 2 = 12 12 ÷ 1.5 = 8 8 ÷ 1 = 8 Therefore, '8' should come in place of '5'.
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