An even number can be split into pairs with none left over. 8 is even because it makes 4 pairs. An odd number always has one left over: 7 makes 3 pairs and 1 extra.
You only need to look at the ones digit. If it is 0, 2, 4, 6 or 8, the number is even. If it is 1, 3, 5, 7 or 9, the number is odd. So 146 is even and 93 is odd.
Worked example
Is 57 odd or even?
- Look at the ones digit: 7.
- 7 is odd, so 57 is odd.
Answer:odd
Key words
- even
- can be made into pairs with none left
- odd
- one is left over when you make pairs
- pair
- a group of two
Practise this
New questions every time.
Common Core-referenced: 2.OA.C.3