Odd One Out: Numbers
Reviewed byEmily Harper
Three number worksheets that get harder step by step. First, children find the odd digit in rows such as 6 6 9 6 6 6. Next, they spot a two-digit number with its digits swapped, like 21 in a row of 12s. On the last sheet they decide which number does not belong: three are even and one is odd, or three are multiples of 5 and one is not.
Odd Number Out: Single Digits
In each row, circle the number that is different.
- 066666
- 838888
- 771777
- 600000
- 522222
- 999996
- 333833
- 555552
- 111171
- 888808
- 000080
- 444944
Odd Number Out: Two-Digit Numbers
In each row, circle the number that is different. Look at the order of the digits.
- 1313131331
- 9669696969
- 1916191919
- 5225252525
- 8118818181
- 1818811818
- 1221212121
- 6886686868
- 5252522552
- 9696699696
- 1616191616
- 1717177117
Which Number Does Not Belong?
Circle the number that does not belong with the other three.
- 30343970the others are even numbers
- 29181381the others are odd numbers
- 40801046the others are multiples of 5
- 53208010the others are multiples of 10
- 1245626the others are even numbers
- 79368373the others are odd numbers
- 45504625the others are multiples of 5
- 8090509the others are multiples of 10
- 1828805the others are even numbers
- 4565663the others are odd numbers
How to use the number sheets
The single-digit sheet suits kindergarten. The two-digit sheet suits Grade 1, when children learn that 12 and 21 are different numbers. The "does not belong" sheet suits Grade 2 and asks children to explain their choice.
On the last sheet, the answer key also says what the other three numbers have in common, so you can talk about the rule.
What children practise
Finding the odd number trains careful looking at digits and the order they are written in, which matters for place value. The last sheet adds reasoning about even, odd and multiples.
For more number practice, see our multiplication worksheets.
More odd one out worksheets
Questions about odd one out numbers worksheet
What age is this for?
Kindergarten to Grade 2. Each sheet is a little harder than the one before.
Are the answers included?
Yes. Each sheet has an answer key, and the last one explains the rule.
What does "does not belong" mean?
Three numbers follow the same rule, such as being even, and one does not.
Are they free?
Yes. All sheets are free to print.