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Last digit of n determines last digit of n^4. All even numbers divide by 2, so are not prime. Any number ending in 5 is a multiple of 5 so is not prime. Primes > 5 end in 1, 3, 7 or 9. If n ends in 1, ...

4m +3 >15 -3 from each side 4m >12 divide each side by 4 to get m on its own m>3

Wenn man eine bestimmten Literaturspate studiert, ist es immer wichtig den Kontext in welchem diese Literatur entstand zu berücksichtigen. Das Thema der Weltkriege ist in...

Students sometimes feel less prepared to analyse unseen prose than unseen poetry, and there are pros and cons to both, but it’s not as difficult as you might think! On the one hand, you can understand the...

An author might use colour to convey a particular mood or emotion. We intuitively associate colours with certain feelings; for example, red is often associated with danger or fear. By using this colour, a...