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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 ...

It will mainly depend on your own interests, so there is no definite answer. In my opinion, the whole calculus section is probably the most significant part of the course as it will take up a significant ...

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...