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If a source is reliable, then what it tells us is likely to be accurate and very close to the truth of what actually happened. In order to determine the extent of a source's reliability, it is easier t...

For two linear simultaneous equations, two algebraic methods can be used to find solutions.The first is elimination, which is usually a lot quicker. Elimination involves subtracting one equation form t...

A is a 2-digit square number. In order to find the smallest N number we want to find the smallest possible 2-digit sqaure number. To sqaure a number means to multiply this number by itself, e.g. the sq...

Ser is used in reference to things that are permanent, or unchanging - eg. Soy de Inglaterra. You can't change where you're from, so you need to use ser. Estar is used to describe temporary thing...

By practicing lots of past paper questions, I will make sure that you understand the necessary structure of an answer. This includes the steps needed for an introduction, the main body o...