11, 47, and 71
There are 21 two-digit prime numbers. The first two-digit prime number is 11, and the last two-digit prime number is 97. Prime numbers are numbers greater than 1 that are only divisible by 1 and themselves.
17, 37, 47, 67, 97
The ratio of the number of one-digit prime numbers to the number of one-digit composite numbers is one to one. The one-digit prime numbers are 2, 3, 5, and 7. The one-digit composite numbers are 4, 6, 8, and 9. Therefor, the ratio is 4:4, which simplifies to 1:1.
1,2,3,5,7
Ten.
Its impossible, there are only 5 single digit numbers that are not prime
1/2
There are 21 two-digit prime numbers.
102.
There are 17 such numbers.
2, 3, 5, and 7 are the only one-digit prime numbers.
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
There are 21 two-digit prime numbers. The first two-digit prime number is 11, and the last two-digit prime number is 97. Prime numbers are numbers greater than 1 that are only divisible by 1 and themselves.
17, 37, 47, 67, 97
997 is the largest 3-digit prime number.
Composite numbers are numbers greater than 1 that have more than two factors. Relatively prime numbers are numbers that have no common factors other than 1. Therefore, to find 3-digit composite numbers that are relatively prime, we need to look for numbers that are composite and have no common factors. An example of such a pair of 3-digit composite numbers that are relatively prime would be 119 and 143.
73 is the largest 2 digit number that is both prime and has prime numbers for both of its digits.