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AQA A LEVEL MATHS BOOK 2 EXAM QUESTIONS AND ANSWERS 2026
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---10June 20262025/2026A
- How can you test n for primality? - ANSWERSDivide by all of the primes less than the square root of n? 
 
What is the easiest way to prove that a statement is not always true? - ANSWERSFind a counter example that disproves the statement. 
 
How does proof by contradiction start? - ANSWERSFrom the opposite of the statement you are trying to prove, and show that this results in an impossible conclusion. 
 
(Assume that ...) 
 
What does co-prime mean? - ANSWERSTwo integers whose only shared positi...
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