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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.
there are 50 prime numbers between 1-100 and of them 2,3,5,7 are single digit so that would leave 46 double digit prime numbers between 1-100
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How many 2 digit prime numbers are there whose unit digit is greater its tens digit?
Ten.
What are the two smallest 2 digit prime numbers that have the digit 2?
23 and 29
What is the difference between the greatest and smallest 2-digit prime numbers?
11 is the smallest 2-digit prime number and 97 is the greatest 2 digit prime number, so their difference is 86
Two prime numbers between 100 and 199 such that the tens digit is a prime number and the tens and ones digit taken together are a 2 digit prime number find the sum of these two prime numbers?
For the tens digit to be a prime number then it must equal 2, 3, 5 or 7. There are four 3-digit prime numbers that fit the above condition and also have the tens and units digits forming a 2-digit prime number. 131, 137, 173, 179. The person supplying the question may like to sum the various combinations.
What is the ratio of the number of one-digit prime numbers and the number of one-digit composite numbers?
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.
How many 2 digit prime numbers are there whose unit digit is greater its tens digit?
Ten.
How many single-digit prime numbers are there?
4: 2, 3, 5 and 7. 1 is not a prime.
What are all of the one-digit prime numbers?
2, 3, 5, and 7 are the only one-digit prime numbers.
What is the largest 2 digit number that is both prime and has prime numbers for both of its digits?
73 is the largest 2 digit number that is both prime and has prime numbers for both of its digits.
HOW MANY PRIME NUMBERS ARE THERE FROM ONE TO HUNDRED THAT HAVE THE DIGIT TWO IN IT?
3 numbers 2, 23 and 29
What is the difference between the greatest and the least 2-digit prime numbers?
Greatest 2 digit prime number is 97. Lease 2 digit prime number is 11.
What is the difference between the greatest and the 2 digit least prime numbers?
Greatest 2 digit Prime number is 97. Lease 2 digit prime number is 11.
What are the two smallest 2 digit prime numbers that have the digit 2?
23 and 29
What are the 10 two digit prime numbers that are the sum of two prime numbers?
For a 2-digit prime number (which are all odd) to be the sum of two prime numbers, one of the prime numbers will have to be 2. That means the difference between the sum and the other addend will have to be 2. Prime numbers that differ by 2 are called twin primes. There are six pairs of 2-digit twin primes. Your numbers are 13, 19, 31, 43, 61 and 73.
What one-digit number is the product of two consecutive prime numbers?
There are only two prime numbers that are consecutive numbers, 2 and 3. Their product is 2 x 3 = 6. The first prime numbers are 2, 3, 5, and 7 and the only two consecutive prime numbers whose product is a single digit are 2 and 3. (The next two consecutive prime numbers, 3 and 5, have a two-digit product.)
What is the difference between the greatest and smallest 2-digit prime numbers?
11 is the smallest 2-digit prime number and 97 is the greatest 2 digit prime number, so their difference is 86
What are the first five 2-digit prime numbers?
The first five two-digit prime numbers are 11, 13, 17, 19, and 23.
