# 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.