# Number is all about, well, numbers.

These topics are for GCSE Maths Level.

It covers; Prime Numbers, Ratios, Lowest Common Factor, Highest Common Factor, Percentages, Fractions, Estimating, Decimals, Standard Index Form, Compound Interest, Surds, Upper & Lower Bounds and much more fun maths type stuff.

## Top Questions

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### What are the first 12 cube numbers?

By Verity Painter on the 8th of January, 2013

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### What is a percentage?

By Lee Mansfield on the 11th of June, 2012

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### What is cumulative frequency?

By Alex Blanc on the 11th of June, 2012

## Topics

 Simplify expressions with surds into the form a + b3 A* Use index laws to evaluate any expression involving powers A* Find the upper and lower bounds of calculations A* Rationalise the denominator of a surd A Use index laws to evaluate simple fractional or negative powers A Convert recurring decimals to fractions and fractions to recurring decimals B Identify recurring and terminating decimals B Calculate using standard index form B Convert between ordinary and standard index form representations B Work out reverse percentage problems B Work out compound interest B Calculate proportional changes using a multiplier B Find the least common multiple (LCM) C Find the highest common factor (HCF) C Write a number as a product of prime factors C Find the reciprocal of a number C Estimate answers to calculations C Use a calculator correctly and efficiently C Find the minimum and maximum values of a number that has been rounded off C Round a number off to a given number of significant figures C Understand the effects of multiplying by numbers between 0 and 1 C Divide a number by a decimal C Work out a percentage increase or decrease C Express one quantity as a percentage of another C Solve ratio and proportion problems such as sharing out C Solve ratio and proportion problems using the unitary method C Calculate with fractions C Understand and learn the words: square, positive and negative square root, cube and cube root, learn squares up to 15x15 and cubes up to 5 cubed D Multiply two numbers involving decimals D Increase or decrease a quantity by a given percentage D Convert between decimals, fractions and percentages D

## Related Questions

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### How do I convert a decimal to a fraction?

By Gareth Banks on the 6th of March, 2013

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### What does it mean when it says a number is recurring?

By Gareth Banks on the 6th of March, 2013

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### Are fractions and percentages basically the same thing?

By Gareth Banks on the 6th of March, 2013

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### What are factors?

By Alexa Samuels on the 5th of March, 2013

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### What is a prime number?

By Alexa Samuels on the 5th of March, 2013

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### What is a "LCM"?

By Alexa Samuels on the 5th of March, 2013

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