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Math Tutor's Solution: 821 is a prime number
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Math Tutor Asks: Is 821 a prime number?
A math tutor would first ask you to begin by defining what a prime number is:
A prime number is a number that is divisible by only itself and 1. Since we see that 821 has only two factors, 1 and 821, then we can come to the conclusion that 821 is a prime number. Another way you can look at the problem is by the factors of 821. By no coincidence, 821’s factors are just 1 and 821 (only just itself and 1), which is the definition of a prime number.
Math Tutor Suggests: Find out if these other numbers are prime too or not!
When it comes to prime numbers, a math tutor recommends it best to learn about them through practice - so why not have a look and find out if any of these numbers are prime or not?
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