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.
there are three odd numbers
6 numbers are odd.
24
There are five odd numbers on an odd number cube?
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.
Four 17 19 21 23
25
25 if you count 1, 24 if you don't.
Go through each of the numbers, and count how many of them are odd. If you count an odd number of them, then their sum is odd. If you count an even number of them, then their sum is even.
there are three odd numbers
26
There are 20 odd numbers in 40.
6 numbers are odd.
24
24
24