1.3 Disproof by counter example

AQA Edexcel OCR A OCR B (MEI)
You can prove that a statement is not true by using a counter example. All you have to do is find just one example which does not work for the statement.
Important
Disproof by counter example involves:

  • Find one example that does not work for the statement to be disproved.
Example 1.3.1
Prove that the following statement is not true:

The product of two prime numbers is always odd.
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