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If you have Excel version 5:0/95 or
above, you can use these sheets directly. Click on the underlined links
in blue to download. To use off-line, you need to save into a folder
or onto a floppy disc. Click here
for advice.
The
Doubling Machine
Click on the blue cell and enter a number. To reset,
click Undo on the Excel toolbar: 
The
Halving Machine
The
Four Times Machine
This sheet is used in the same way. It aims
to show the ease of finding four times a number by doubling it twice.
To reset, click Undo on the Excel toolbar:
What's
my number?
This is a book of three sheets which give the sum
and product of two mystery numbers. The numbers in the coloured cells
can be altered to control the difficulty, by setting the maximum and
minimum values for the two random numbers. Changing these values gives
a new problem. Alternatively, click on the Sheet2 and Sheet3 tabs.
If you scroll the sheet down, the answers are revealed!
For more spreadsheets and MyWorld
screens, visit
Deal
Parochial's web site
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