There are few real-life uses for prime numbers. Nevertheless, they do have a useful purpose in some cases. For instance:
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Prime numbers are used to encrypt credit cards and identify them.
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it is when you "factor tree" a number down until it cn non longer be broken down.2 factors of 84 are 4 and 21 because when you multiply them, you get 84. factor 4 down into 2 and 2. factor 21 down into 3 and 7. in this case, the prime factorization is two to the second power times three times seven.
To find the greatest common factor (GCF) of 12, 28, and 40, you need to identify the factors of each number. The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 28 are 1, 2, 4, 7, 14, and 28. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. The greatest common factor among these numbers is 4.
There are multiple uses and application of negative numbers. They are used on a daily basis when describing temperature and in banking. For example, an overdrawn balance will be reported in negative amounts.