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Here they are: 4, 6, 8, 9, 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, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100

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There is no pattern. That is one of the great mysteries of mathematics.

Q: What is the pattern of composite numbers up to 100?

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The odd numbers are 101, 103, 105, 107, 109, etc. - just add two at a time. To include only composite numbers, look up a table of prime numbers, and delete those from the list.

24 is composite because it can factored or split up as 24 = 3 * 8 for example. Prime numbers, such as 23, can not be split into factors.

4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48, and 49

The first two prime numbers add up to another prime number.

Please note that there are infinitely many prime numbers. An Internet search for "list of prime numbers" will quickly give you a list of prime numbers up to a certain point, for example here: http://en.wikipedia.org/wiki/List_of_prime_numbers Any integer greater than 1 that is not in the list of prime numbers is a composite number. (1 is considered neither a prime number, nor a composite number.)

Related questions

All composite numbers have more than 2 factors but prime numbers have only 2 factors

There are four of them.

The composite numbers up to 20 are 4,6,8,9,12,14,15,16,18 and 20.

They are 4, 9, 25 and 49.

There are 18 composite numbers up to and including 30

No two (or more) composite numbers can multiply to 30.

what is all the composite numbers from one to five hundred

The odd numbers are 101, 103, 105, 107, 109, etc. - just add two at a time. To include only composite numbers, look up a table of prime numbers, and delete those from the list.

All the multiples of 11 up to 100 except 11 itself which is a prime number

There are infinitely many composite numbers so a list is impossible. Furthermore, there is no systematic pattern to composite numbers so that it is not possible to give a functional definition either. There are, however, some lists of prime numbers and you can remove these from integers greater than 1 to arrive at partial lists of composite numbers. For composites up to 1 million, see the related link.

Add them up. 90, 91, 92, 93, 94, 95, 96, 98, 99, 100

Look up a table of prime numbers. All those numbers that are not prime, are composite - except 1, which is neither prime nor composite.