# Lesson Worksheet: Identifying Odd and Even Numbers: Pairing or Grouping Mathematics • 2nd Grade

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.

Q1:

Here is a group of 9 people. Can we divide the group into pairs so that everyone has a partner?

• AYes
• BNo

Q2:

Is the number of stars even or odd? • Aeven
• Bodd

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.

Q4:

Here is a group of 8 people. Can we divide the group into pairs so that everyone has a partner?

• Ayes
• Bno

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:

David 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:

Is the number of circles in the figure even or odd? • Aeven
• Bodd

Q13:

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 Q14:

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.

Q15:

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

Q16:

Is 9 even or odd? • Aodd
• Beven

Q17:

Is 13 even or odd?

• Aodd
• Beven

Q18:

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 Q19:

Is 8 even or odd? • Aeven
• Bodd

Q20:

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 Q21:

There is a group of 6 people.

Can we split them into two groups with the same number of people in each group? • Ano
• Byes

Q22:

There are the same number of squares in each of these two circles. Is the total number of squares even or odd?

• Aodd
• Beven

Q23:

There is a group of 7 people. Can we split them into two groups with the same number of people in each group?

• AYes
• BNo