42 and 84
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To write a composite number as a product of two prime numbers, write it as an answered multiplication question like 2 x 17 = 34 or 3 x 3 x 7 = 63.
As a product of its prime factors in exponents: 22*3*52 = 300
composite and 2*2*7 = 28
405 = 3 x 3 x 3 x 3 x 5
295 is composite - 5 x 59.