Leap Year

Boy with dog

Johnny Leaper was born on the 29th February 2012.

1. On his third birthday, how old will he really be?

2. In which year will his age be the square of his birthday?

3. In which year will his age be the cube of his birthday?

A Mathematics Lesson Starter Of The Day

Topics: Starter | Number

  • Mrs John, Bishop Tufnell
  • 'thank you' this was brilliant for the class quite tricky too. However, I would like to see more like this.
  • Transum,
  • Thanks for your feedback Mrs John. You might find the puzzle about leap years published in the February 2024 Transum Newsletter of interest. You can see it here.

    Leap Birthdays

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.
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The probability of being born on a leap day is not \( \frac{1}{366} \)

What is it?

Leap Year Flowchart


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Laptops In Lessons

Teacher, do your students have access to computers such as tablets, iPads or Laptops?  This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:


However it would be better to assign one of the student interactive activities below.

Laptops In Lessons

Here is the URL which will take them to a fantastic video that explains
why some years have an extra leap day and what it is for.


Here is the URL which will take you to the main Birthday Maths Hub.


Student Activity


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