The composite numbers between 70 and 80 are 72, 74, 75, 76, 77 and 78.
They are even
All even numbers between 50 and 80 are composite.
Since they can both be evenly divided by factors other than themselves and 1, they are both composite numbers.
81, 82, 84, 85, 86, 87, 88. 80 and 90 are composite too
They are the numbers that have more than two factors in them.
452
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.
All of them except for 83 and 89 which are prime numbers
All of them except for 83, 89 and 97 which are prime numbers
No. All even numbers are composite except the number 2.
60 and 80 :D