1,3,5,7,9,11,13,15,17,19,etc
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.
2,4,6,8,10,12,14,16,18
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
30
The two-digit whole numbers that have no odd factors except 1 are the powers of 2, as these numbers are only divisible by 1 and themselves. The two-digit powers of 2 are 16, 32, 64, and 128. However, 128 is not a two-digit number, so we only consider 16, 32, and 64. Therefore, there are three two-digit whole numbers that meet the criteria: 16, 32, and 64.
There is no such thing as "the 2 digit odd number": there are 45 such numbers. They are numbers of the from 10p+q where p and q are positive integers and q is one of {1, 3, 5, 7, 9}.
99 is a two digit odd number
They're every other counting number beginning with 11 and ending with 99 .
You can just add the last digit of each number. Whenever you get a two-digit number, you can discard all digits except the last one. Another alternative is to count how many odd numbers there are - once again, you only need to consider the last digit. If the number of odd numbers is even, the sum is even; otherwise it is odd. (You can ignore even numbers for this calculation.)
The greatest two-digit odd number is 99. In a two-digit number, the first digit can range from 1 to 9, and the second digit can range from 0 to 9. Since we are looking for an odd number, the second digit must be odd, limiting our options to 1, 3, 5, 7, or 9. Among these, 99 is the greatest possible two-digit odd number.
The product of two odd numbers is always odd.
The product of two odd numbers is always an odd number.