Is 23 odd or even

Step by step

The question

Question: is 23 odd or even?

Even means it makes pairs, with none left over.

Odd means one is left over.

1 Look at the ones

23 is 20 and 3.

Every ten makes 5 pairs.

So 20 is all pairs.

Only the 3 ones are left to check.

2 Put the ones in pairs

Here are 3 dots in pairs.

A pair is 2.

Ring each pair.

One dot has no partner.

3 Odd or even

One is left over.

So 23 is odd.

4 Check

We count by 2s from 20: 20, 22, 24.

We jump over 23.

23 is not on the list.

Yes!

It works.

Let's look back.

First: look at the ones.

Then: put the ones in pairs.

Then: odd or even.

Last: check.