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Rearranging equations to find x.

The first thing to do is to look at the 3. To 'get rid' of the 3 from the left we need to minus 3. Remember we must do the same to both sides so we also minus 3 fro...

The idea for this is simply counting the number of possibilities of each digit. Since the number is a multiple of 5, then we must have it finishing with 0 or 5, i.e., we have 2 possibilities for the last ...

This question is about understanding how reactions happen, what it means for something to react and the factors controlling reactions. Here it is important to know that for a reaction to happen particles ...

In this question we are as to solve this equation and therefore find the value of x. This means we need to isolate x to find a value for it. To do this we use the reverse rules for BIDMAS whereby the firs...

Central to this question is an understanding of the difference between an accelerating object and an object travelling at terminal velocity. Firstly, the experiment is carried out on the moo...