45 has only one number and that is 45. It is odd so 45 has one odd number.
45
45, 63, 81, 99, 117
six 37 39 41 43 45 47
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.
There are 20 odd numbers in 40.
There are 45 such numbers.
45
45 of them.
31, 33, 35, 37, 39, 41, 43 & 45 = eight odd numbers !
45
To determine whether the sum of several numbers is even or odd, you can count the number of odd and even numbers in the set. If there are an even number of odd numbers, the sum will be even; if there is an odd number of odd numbers, the sum will be odd. For the numbers 13, 45, 24, and 17, there are three odd numbers (13, 45, and 17) and one even number (24), so the sum is odd.
There are ninety 2-digit numbers all together. 45 of them are odd numbers. The other 45 of them are even numbers.
Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.
odd numbers between 25 and 45 inclusive are 25 27 29 31 33 35 37 39 41 43 45
5*9= 45
There are 22 odd numbers between 1 and 45. These numbers are 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, and 45. Odd numbers in this range can be found by starting from 1 and adding 2 repeatedly.
The GCF of any two odd numbers is also odd.