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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 ...

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...

Firstly, try and make one of the variables (x or y) the same in both equation, in this instance because we have a positive and negative y if we add them, they will cancel out. Therefore multiply the first...

To calculate the desired probability we need to calculate the number n of arrangements of the kids such that the girls sit together and the bous sit together and then calculate the total number m of arran...