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.

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.