Creating and manipulating expressions and formulae
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problemFavouriteLegs Eleven
Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?
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problemFavouriteThink of Two Numbers
Think of two whole numbers under 10, and follow the steps. I can work out both your numbers very quickly. How?
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problemFavouriteMore Number Pyramids
When number pyramids have a sequence on the bottom layer, some interesting patterns emerge...
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problemFavouriteChristmas Chocolates
How could Penny, Tom and Matthew work out how many chocolates there are in different sized boxes?
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problemFavouriteSeven Squares
Watch these videos to see how Phoebe, Alice and Luke chose to draw 7 squares. How would they draw 100?
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problemFavouriteTemperature
Is there a temperature at which Celsius and Fahrenheit readings are the same?
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problemFavouriteAlways a Multiple?
Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...
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problemFavouriteQuadrilaterals in a Square
What's special about the area of quadrilaterals drawn in a square?
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