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iVinArrow [24]
3 years ago
8

Can someone explain to me what prime numbers are?

Mathematics
2 answers:
Ket [755]3 years ago
7 0
A prime number is a number greater than one and can only be divided by 1 and itself. The result is always a whole number, i.e. no fractions, decimals, remainders. 

<span>Example: </span>
<span>2 can only be divided by 1 and itself </span>
<span>3 can only be divided by 1 and itself. </span>

<span>4 however, can be divided by 1 or 2 or itself </span>

<span>1 is not a prime number since it is not greater than one.</span>
Zinaida [17]3 years ago
4 0
Prime numbers are positive integers that cannot be factored. Meaning it cannot be divided by any other number but 1 and itself.

For example:
2 is a prime number. It can only be divided by 1 and 2.
4 is not a prime number. Because it can be divided by 1, 2, and 4.

Take note: prime numbers are POSITIVE integers only.

Additional information about prime numbers:
* The only even prime number is 2. The rest even number are not prime numbers because it can be divided by 2.
* zero and 1 are not considered prime numbers
* numbers that are not prime numbers are called composite numbers.
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</span>
If you multiply two numbers from a closed set the answer is in the set. 
<span>So A is not closed because 2 x 2 = 4 which isn't in the set. Only 0.5, 1, and 2 are in set A. </span>

<span>Try multiplying the largest numbers in sets B, C, and D by themselves. You will soon discover the closed set.</span>
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