51, 52, 53, 54, 55, 56, 57, 58, 59.
Of those 53 and 59 are prime numbers.
They start with the letter t.They are two-digit numbers.They are not prime.They start with the letter t.They are two-digit numbers.They are not prime.They start with the letter t.They are two-digit numbers.They are not prime.They start with the letter t.They are two-digit numbers.They are not prime.
There are five such numbers.
The first five two-digit prime numbers are 11, 13, 17, 19, and 23.
51,52,53,54,55,56,57,58,59.
The smallest two-digit odd number is 11. It is the first odd number that falls within the range of two-digit numbers, which start from 10.
There are five such numbers: 11, 12, 15, 24 and 36.
There are five numbers: 18, 36, 54, 72, 90.
The answer will depend on how many digits there are in each of the 30 numbers. If the 30 numbers are all 6-digit numbers then the answer is NONE! If the 30 numbers are the first 30 counting numbers then there are 126 combinations of five 1-digit numbers, 1764 combinations of three 1-digit numbers and one 2-digit number, and 1710 combinations of one 1-digit number and two 2-digit numbers. That makes a total of 3600 5-digit combinations.
The greatest sum of two two-digit numbers occurs when you add the largest two-digit numbers together. The largest two-digit number is 99. Therefore, the greatest sum of two two-digit numbers is 99 + 99, which equals 198.
There are 21 two-digit prime numbers.
Three-digit numbers start at 100. Two-digit numbers start at 10. So out of 1 - 99, the first 9 don't count. That leaves 99 - 9 = 90.
Oh, isn't that a happy little question! To find the two-digit numbers divisible by 3, we start by finding the first two-digit number divisible by 3, which is 12. Then, we find the last two-digit number divisible by 3, which is 99. Now, we can count how many numbers there are between 12 and 99 that are divisible by 3.