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55 has factors other than 1 and itself, so it is not a Prime number. For example, 55 is divisible by 5. (You can tell this because the last digit is a 5. If the last digit - the digit in the ones place - is a 5 or a 0, the number is divisible by 5.) Therefore, 55 is a composite number.
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โˆ™ 2017-02-20 09:01:07
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Factoring and Multiples

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โˆ™ 2012-02-26 03:00:04

5.5 is neither. It must be a whole number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

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โˆ™ 2012-02-26 00:59:41

55 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1, 2, and 0. 1, 2, and 0 have a different name.

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Q: Is 55 composite or prime
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Related questions

Is 55 a composite or prime?

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