what is the least prime number between 80 & 90?
Does 81 have factors?
does 82 (or any even number) have factors?
what about 83?
To find the least prime number between 80 and 90, we can start by listing all the numbers between 80 and 90 and then checking if each number is prime.
The numbers between 80 and 90 are 81, 82, 83, 84, 85, 86, 87, 88, 89, and 90.
To determine if a number is prime, we need to check if it is divisible only by 1 and itself. We can do this by dividing the number by all the numbers from 2 to the square root of the number (rounded up to the nearest whole number).
Let's go through each number and check if it is prime:
81 is divisible by 3 since 81/3 = 27. Therefore, it is not prime.
82 is divisible by 2 and 41, so it is not prime.
83 is only divisible by 1 and itself, so it is prime.
84 is divisible by 2, 3, 4, 6, 7, 12, 14, 21, 28, and 42. Therefore, it is not prime.
85 is divisible by 5 and 17, so it is not prime.
86 is divisible by 2 and 43, so it is not prime.
87 is divisible by 3 and 29, so it is not prime.
88 is divisible by 2, 4, 8, 11, and 22. Therefore, it is not prime.
89 is only divisible by 1 and itself, so it is prime.
90 is divisible by 2, 3, 5, 6, 9, 10, 15, 18, 30, and 45. Therefore, it is not prime.
So, the least prime number between 80 and 90 is 83.