1 and 3.
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The lowest number in the 21 times table and 24 times table is 21 x 24 21 24 --- 4 420 ----- 424
21 is composite number because it has more than one number that goes into it
No even number gose in 21. In fact there is none that goes in 21, either.
three24/3 = 863/3 = 21
It is 1