22, 77, 55, 121, 77, 99, 88, 33, 88, 121, 99, 44, 66, 99, 22, 121, 66, 88, 55, 22, 66, 88, 99, 22, 110, 99, 88, 44, 88, 55, 55, 77, 22, 33, 88, 55, 66, 110, 99, 33, 44, 66, 66, 77, 55, 121, 92, 88, 77, 22.
Which number is the odd one out? Write down as many reasons as you can think of explaining why that number is the odd one out.
Starter of The Day Menu | Transum Software
How did you use this starter? Can you suggest
how teachers could present or develop this resource? Do you have any comments? It is always useful to receive
feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.
Keywords: Starter
| Number Patterns
Good, achieved the results I required
Satisfactory
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.
This starter has scored a mean of 3.5 out of 5 based on 37 votes.
Previous Day | This starter is for 30 April | Next Day
Visit the Transum
Online Shop
![]()

92 is the odd one out. All of the other numbers are multiples of 11
Did you have a different reason?
Did you have a different answer?
Your teacher can decide if you are right or wrong.
Note to teacher: Click the button above to generate a new set of numbers. The numbers are chosen at random so some sets will be more appropriate to your class than others.