Exam-Style Question on Proof
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 187. This question is similar to one that appeared on a GCSE Higher paper (specimen) for 2017. The use of a calculator is allowed.
(a) Prove that the product of two consecutive whole numbers is always even.
(b) Prove, by giving a counter example, that the sum of four consecutive integers is not always divisible by 4.
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