Worksheet: Identifying Odd and Even Numbers: Pairing or Grouping
In this worksheet, we will practice deciding if a number up to 20 is even or odd by investigating whether you can divide it into two equal groups without any remainders.
Q3:
Hannah counted 19 plants in her garden, but 4 of them were weeds. Will she have an even or odd number of plants after she removes the weeds? Why?
- AAn even number, because there will not be one left over.
- BAn even number, because 4 is even.
- CAn odd number, because 15 things have one left over when you put them in pairs.
- DAn odd number, because the digit 1 in 15 is odd.
Q5:
A number is odd if we cannot split it into groups of two with nothing left over.
If we try to split these 9 squares into groups of 2, there is always one left over. So, 9 is odd.
Which of the following numbers is odd?
- A
- B
- C
- D
Q6:
Every child has a partner to work with.
Is the total number of children even or odd?
- Aodd
- Beven
Q7:
Is the number of cats even or odd?
- AEven
- BOdd
Q8:
James is using a ten frame to see if numbers are even or odd. He colors 6 squares in the ten frame and tries to pair each square in the top row with the square under it.
He sees that he can divide 6 into three pairs, so 6 is an even number. Then, he colors 9 squares in the same way.
He sees that he cannot divide 9 into pairs. There is one left over, so 9 is an odd number. Now it is your turn, pick the ten frame that shows that 7 is an odd number.
- A
- B
- C
- D
- E
Q9:
These children wanted to work in pairs but there was one child left.
Is the total number of children even or odd?
- Aodd
- Beven
Q10:
Is 16 even or odd?
- Aeven
- Bodd
Q11:
If I add an odd number and an even number, the result is number.
- Aa prime
- Ban odd
- Can even
Q12:
Mason and Charlotte are making number patterns. They are going to write a number pattern that starts at 7 using the rule add 2.
Mason thinks that the numbers will all be odd because 7 is odd, and adding 2 to odd numbers will always give an odd number.
Charlotte thinks that the numbers will be odd and even because 7 is odd and 2 is even.
Who is correct?
- AMason
- BCharlotte
Q13:
Is the number of circles in the figure even or odd?
- Aeven
- Bodd
Q14:
A number is even if it can be split into two groups of equal size.
These 6 squares can be split into two groups of 3 squares. So, 6 is even.
Which of the following numbers is even?
- A
- B
- C
- D
- E
Q15:
Ethan bought a pack of 15 stickers. He already had 3 of them, so he gave them to his friend. Does he have an odd or even number of stickers left?
- AAn odd number, because 3 is odd.
- BAn odd number, because they cannot be put into two equal groups.
- CAn even number, because 12 things can be put into two equal groups.
- DAn even number, because the digit 8 in 18 is even.
- EAn odd number, because the digit 1 in 12 is odd.
Q16:
There are the same number of squares in each of these two circles, and one more square is outside the circles.
Is the total number of squares even or odd?
- Aeven
- Bodd
Q18:
Is 13 even or odd?
- Aodd
- Beven
Q19:
A number is even if we can split it into groups of two with nothing left over.
These 8 squares can be split into 4 groups of 2 squares. So, 8 is even.
Which of the following numbers is even?
- A
- B
- C
- D
Q21:
A number is odd if it cannot be split into two groups of equal size.
These 7 squares can be split into two groups of 3 with 1 left over. So, 7 is odd.
Which of the following numbers is odd?
- A
- B
- C
- D
- E
Q22:
Here is a group of 6 people.
Can we split them into two groups with the same number of people in each group?
- Ano
- Byes
Q24:
Here is a group of 7 people.
Can we split them into two groups with the same number of people in each group?
- Ayes
- Bno