number · Year 4 · AC9M4N02
Odd and even numbers
A number is even if it can be shared into two equal whole groups, and odd if one is left over. You only need the ones digit to tell: 0, 2, 4, 6 and 8 are even, and 1, 3, 5, 7 and 9 are odd. So 34 is even because it ends in 4, and 25 is odd because it ends in 5. Zero counts as even, so numbers ending in 0 — like 40 — are even. Do not add the digits or look at the first digit.
Sample questions
Is 70 odd or even?
- Look at the ones digit of 70: 0.
- 0 is even, so 70 is even.
Answer: even
Is 78 odd or even?
- Look at the ones digit of 78: 8.
- 8 is even, so 78 is even.
Answer: even
Is 17 odd or even?
- Look at the ones digit of 17: 7.
- 7 is odd, so 17 is odd.
Answer: odd