There are no prime numbers between 70 and 80 because all the numbers in that range have factors other than 1 and themselves. For example, 72 can be divided evenly by 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36, so it is not a prime number. Similarly, all the other numbers between 70 and 80 have multiple factors, making them composite numbers.
71,73,79
452
The prime numbers between 70 and 80 are 71, 73, and 79.
The three prime numbers between 70 and 80 are: 71, 73, 79
There are no prime numbers between 70 and 80 because all the numbers in that range have factors other than 1 and themselves. For example, 72 can be divided evenly by 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36, so it is not a prime number. Similarly, all the other numbers between 70 and 80 have multiple factors, making them composite numbers.
The halfway point between 70 and 80 is (70 + 80) ÷ 2 = 75
Try the different numbers - there are only 11 after all - and multiply their digits. Or analyze the factors of the number 21.
71,73,79
452
The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80
71, 73, 79
The prime numbers between 70 and 80 are 71, 73, and 79.
The prime numbers between 70 and 80 are 71, 73, and 79.
The GCF of 60, 70, and 80 is 10. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70. The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80. The common factors are 1, 2, 5, and 10. Therefore, the greatest common factor is 10.
The three prime numbers between 70 and 80 are: 71, 73, 79
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.