The product of two odd numbers is always odd, while the product of two even numbers is always even.
Here are some rules for multiplying numbers:
Even numbers: Even numbers are integers that have 2 as a factor. When you multiply two numbers, you multiply all the factors of both of them. If 2 was a factor of either number, or of both, then it's a factor of their product.
Odd numbers: If all of the numbers being multiplied together are odd, the product will be odd.
Even and odd numbers: The product of an even number and any other number is always even.
Some companies use odd quantities and weights to make it harder for customers to compare prices.
