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Earn +20 ptsQ: Are composite numbers closed under addition?
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Are prime numbers closed under addition?
no, not all prime numbers are closed under addition. why? because, when you add 2 prime numbers you will not always get a prime number. example: 5+3= 8 5 and 3 are prime numbers but their sum is 8 which is a composite number..
Are composite numbers closed under multiplication?
Yes.
Under which operation are natural numbers closed?
Addition.
Is the set of odd numbers closed under addition?
no
Are rational numbers closed under subtraction?
Yes. They are closed under addition, subtraction, multiplication. The rational numbers WITHOUT ZERO are closed under division.
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