Answer:
(4)The lowest common denominator of 3 and 8 is 24.
(5) The lowest common denominator of 5 and 10 is 10.
(6) The lowest common denominator of 7 and 3 is 21.
(7) The lowest common denominator of 4 and 5 is 20.
(8) The lowest common denominator of 2 and 12 is 12.
(9) The lowest common denominator of 15 and 5 is 15.
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