Odd or even

Mathematics · Number Representation & Place Value · ages 7-8

Name ______________________ Date ____________

Count by 2s: 2, 4, 6. What comes next?
Answer: ______________
Which number is odd?
- 8
- 12
- 9
- 6
Look at these dots. Pair them up. Is the number of dots odd or even?
- Odd
- Even
- Cannot tell
If you pair up a group and one thing is left over with no partner, the group is even.
Circle one: True False
Pair up 11 counters. How many are left over?
Answer: ______________
Which addition shows an even number written as two equal addends?
- 8 = 4 + 4
- 8 = 5 + 3
- 8 = 6 + 1
Which number is even?
- 7
- 9
- 11
- 12
Lena counts by 2s and lands exactly on 14. She says 14 is even. Is Lena right?
Circle one: True False
Sam says 15 is even because it is bigger than 10. What is wrong with his thinking?
- He is right, all big numbers are even
- 15 is odd only if you count by 5s
- Size does not decide odd or even; pairing 15 leaves one left over
Which pair are both odd?
- 12 and 15
- 13 and 15
- 13 and 14
- 12 and 14

Answer key

For grown-ups. Fold this page away before handing over the rest.

8 · Counting by 2s after 6 comes 8.
9 · 9 is odd. 8, 12 and 6 all split into equal pairs.
Even · 6 dots make 3 pairs with none left over, so it is even.
False · A leftover with no partner means the group is odd, not even.
1 · 11 pairs into 5 and 5 with 1 left over.
8 = 4 + 4 · Even numbers split evenly in half, so 8 = 4 + 4 works.
12 · 12 is even. 7, 9 and 11 each leave 1 unpaired.
True · Lena is right: the 2s count reaches 2, 4, 6, 8, 10, 12, 14.
Size does not decide odd or even; pairing 15 leaves one left over · Odd or even depends on whether pairing leaves a leftover, not on how big the number is. 15 pairs into 7 pairs with 1 left over, so it is odd.
13 and 15 · 13 and 15 are both odd. Every other pair contains an even number.