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Gran, How Old Are You?

When Charlie asked his grandmother how old she is, he didn't get a straightforward reply! Can you work out how old she is?

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Follow the Numbers

What happens when you add the digits of a number then multiply the result by 2 and you keep doing this? You could try for different numbers and different rules.

Extending Great Squares

Age 7 to 11 Challenge Level:
The activity is intended to extend Grrrreat Squares for those who need/want something much more challenging.

 
Choose one or more of the following five sets of pictures and explore them further for number patterns, area implications, trigonometrical facts and predictions.
 

$1$
 2
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$2$
 3
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$3$

 4
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$4$

 5
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$5$

 6