Our number system uses powers of 10 to express large numbers concisely. These problems have been chosen to help you develop a better understanding of this place value system.
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Favourite
Dicey Operations
Who said that adding, subtracting, multiplying and dividing couldn't be fun?
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Two and Two
Age
7 to 16
Challenge level
How many solutions can you find to this sum? Each of the different letters stands for a different number.
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Difference Sudoku
Age
14 to 16
Challenge level
Use the differences to find the solution to this Sudoku.
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Always a multiple?
Age
11 to 14
Challenge level
Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...
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Method in multiplying madness?
Age
7 to 14
Challenge level
Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?
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Power mad!
Age
11 to 14
Challenge level
Powers of numbers behave in surprising ways. Take a look at some of these and try to explain why they are true.
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Place value, integers, ordering & rounding
Challenge level
Working on these problems will help you develop a better understanding of place value, ordering and rounding.
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Number operations & calculation methods
Challenge level
Working on these problems will help you develop a better understanding of number operations and calculation methods.