10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82.
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82 is composite because it is even. Any number that ends in 0,2,4, 6. or 8 is composite because it is even and all even numbers are composite.
The factors of 246 are 1, 2, 3, 6, 41, 82, 123, and 246. The composite factors of 246 are 6, 82, 123, and 246.
81, 82, 84, 85, 86, 87, 88. 80 and 90 are composite too
The composite numbers are: 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86 ,87, 88
No such combination. Only two prime numbers: 2 and 41