1, 2, 4, 5, 8, 10, 16, 20, 40, 80
Chat with our AI personalities
The prime numbers (factors) of 80 are: 2 and 5
They are the numbers that have more than two factors in them.
ANSWER: 70 and 80 are not prime numbers. They are composite numbers:70 is a composite number because the factors of 70 other 1 and itself (70) are 2, 5, 7, 10, 14, and 35.80 is also a composite number because the factors of 80 other 1 and itself (80) are 2, 4, 5, 8, 10,16, 20, and 40.
There are 5 prime numbers from 60 to 80:61, 67, 71, 73 and 79
Since they can both be evenly divided by factors other than themselves and 1, they are both composite numbers.