AI Tutor
Imagine you are matching up socks from the laundry basket. Can every sock find a best buddy?
When every item finds a partner and none is left all alone, we say the group makes an even number.
What happens if we try this with a different set of toys? Let's check with 4 toy cars.

Making Pairs of Two

A pair is a team of exactly two items that belong together.
To determine if a total quantity is even, objects can be arranged into groups of 22 as buddies or partners.
Can we do the exact same thing with a bigger pile of objects? Let's test 8 shiny stars.

Testing Bigger Groups

Let's count out 8 stars and buddy them up two by two.
Remember, a number is only even if every single item gets a partner.