Q: What are 21's composite numbers?

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Rectangular numbers are a subset of composite numbers. The squares of prime numbers will be composite but not rectangular.

composite numbers are those that have more than 2 factors. all even numbers other than 2 are composite numbers and some odd numbers are composite numbers. numbers that are prime are the numbers that are not composite numbers i hope this answers your question :)

No. Prime numbers cannot be composite and composite numbers cannot be prime!

All numbers have factors. Some factors are prime numbers, some are composite numbers. A factor that is a composite number is a composite factor.

There are not 10 laws of composite numbers so the question is based on a complete misunderstanding of what composite numbers are!

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Not all composite numbers are even, but all even numbers except 2 are composite.

Rectangular numbers are a subset of composite numbers. The squares of prime numbers will be composite but not rectangular.

composite numbers are those that have more than 2 factors. all even numbers other than 2 are composite numbers and some odd numbers are composite numbers. numbers that are prime are the numbers that are not composite numbers i hope this answers your question :)

Both are composite numbers

30,32,33,34,35,36,38,39,40 are the composite numbers between 30 and 40. Composite numbers are numbers that are not prime numbers.

The number of composite numbers is infinite.

Yes, the numbers from 90 to 96 are composite numbers.

849670 is a composite number. All even numbers over 2 are composite numbers.

No. Prime numbers cannot be composite and composite numbers cannot be prime!

All numbers have factors. Some factors are prime numbers, some are composite numbers. A factor that is a composite number is a composite factor.

Even composite numbers can, odd composite numbers can't.

There are not 10 laws of composite numbers so the question is based on a complete misunderstanding of what composite numbers are!