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The key observation here is that all numbers below n, by definition, divide n!=nx(n-1)x(n-2)x...x1.So in particular, if n greater or equal to 5, 5 divides n!, and thus is divides n!+5.Hence, if n!+5=p and...

The important thing to remember about the ELAT is that it is not designed to test your memory of knowledge of texts, but instead to test your aptitude and close reading skills, and most i...

We have derivative rules. Some of them involve:If f(x)= (x)^a=> f'(x)= a*x^a-1If f(x)= ln x=> f'(x)= 1/xIf f(x)= sin x=> f'(x)=cos xTherefore, f(x)= 6y+1/x+cos x

There are three things that Oxford tutors are looking for in an interview. All of these things have to come across naturally as they can see through if you are being disingenuous.
Passion for the ...