A composite number is a number with more than two positive integer factors. As such, the first ten composite numbers are:
4, 6, 8, 9, 10, 12, 14, 15, 16, 18
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the answer of the first 4 composite numbers is 27
18. The first ten composite numbers are: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18
The only prime number in the 90s is 97. So out of ten numbers one is a prime number and the remaining nine numbers are composite numbers. So 90s comprises of both prime numbers and composite numbers.
the answer is 120 because the first three prime numbers are 2,3,5 and the first three composite numbers are 4,6,8.