This is part of our Secondary collection of Short Problems.
You may also be interested in our longer problems on Number.
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Place Value, Integers, Ordering and Rounding
Age: 11-16
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Factors, Multiples and Primes
Age: 11-16
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Powers and Roots
Age: 11-16
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Fractions, Decimals and Percentages
Age: 11-16
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Number Operations and Calculation Methods
Age: 11-16
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Ratio, Proportion and Rates of Change
Age: 11-16