Halve It

Start with 100.

Halve it to get 50

Halve it to get 25

Continue as far as possible.

No Calculators

[Decimal fractions are allowed]

You have

A Mathematics Lesson Starter Of The Day


Topics: Starter | Arithmetic

  • Transum,
  • A challenge for the more able who volunteer... two students stand at the front of the class with their back to the screen (which is showing the answers below and which the rest of the class can see). The first volunteer says 100. The second halves that and says the answer. The first halves the second's number and so on. The winner is the one who can last the longest without making a mistake.

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.

If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:

Excellent, I would like to see more like this
Good, achieved the results I required
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 3.2 out of 5 based on 168 votes.

Previous Day | This starter is for 9 July | Next Day



Sign in to your Transum subscription account to see the answers

Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items I have chosen and recommend to get you started. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.


Online Maths Shop

Laptops In Lessons

Teacher, do your students have access to computers?
Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here a concise URL for a version of this page without the comments.


Here is the URL which will take them to a division quiz.


Student Activity



©1997-2020 WWW.TRANSUM.ORG