Dimidiate

1. Arrange the digits from 1 to 9 in alphabetical order.


2. Memorise the large number you have created.


3. Close your eyes, can you remember it?


4. How many times can you halve this number (without a calculator) to give a whole number answer?

Number Landscape

A Mathematics Lesson Starter Of The Day


Topics: Starter | Arithmetic | Number

  • Angela Lowry,
  •  
  • I think these are great! So useful and handy, the children love them.
    Could we have some on angles too please?
  • Transum,
  •  
  • The starter for the 28th May involves estimating angles.

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.

Previous Day | This starter is for 2 May | Next Day

 

Answers

Extension

What are the prime factors of this large alphabetical number?



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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.

Transum.org/go/?Start=May2

Here is the URL which will take them to an activity about recognising prime numbers.

Transum.org/go/?to=pandigital

Student Activity

 


 

 

 

Extension Answers

29×33×61843

 

FACT button

Tip For Teacher

Most people don't know all of the wonderful things our calculators can do. There are just so many buttons and functions.

Do you have this strange FACT function on your calculator? Do you know what it does?

Type a number (48 is a good example) into the calculator then press the equals button.

Next press shift then this button with FACT written over it.

You should now see 24 × 3 in the calculator display.

The function performed the prime factorisation of 48.

Very useful.

So this button can be used to find out if a number is a prime number as the prime factorisation function will return the original number.

Apple

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