Read the following conjecture.
any number that is divisible by 3 is also divisible by 6.
find a counterexample to show that the conjecture is false.

The counter example is really easy. It would be: 9 is divisible by 3 but NOT divisible by 6. Another will be  3 is divisible by 3 but not by 6. We know this because basically every 2nd multiple of 3 is divisible by 3. hope this helps

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