A pumpkin weighed 6½ kg before it was carved. It now weighs 1½ kg. What fraction of its weight has been removed?
How many ghosts are in the haunted house?
Here are some clues:
There are more than the number of days in October
There are less than the product of 7 and 5
The answer is an odd number
Seven mummies making groaning sounds
Are standing in a row.
They each have worms between their teeth
That wriggle to and fro.
Each mummy chews on one more worm
Than the mummy to its right
The total number of these worms
Is ninety one tonight.
Work out the number of worms each of the seven mummies has between their teeth.
How many bats?
Clue: A square number;
More than four squared;
Less than four cubed;
Even.
11 22 8 21
Will you enter the haunted house or are you 2^{2}?
Teacher: Tap on a window for a Halloween Starter.
Topics: Starter  Fractions  Mixed
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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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: Transum.org/go/?Start=October31 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to a related student activity called 'Trick or Treat'.
But if it is something less mathematical with a Halloween theme you want:
Spooky sound effect (Ambient Darkness) is by D J Chronos at Freesound.org