My usual test of #chatgpt is to give it a huge number and ask if it's even or odd. It recently passed the test.
Inspired by a hacker news post about doing fizzbuzz by converting to base 15, I gave it a number in base 15 and asked it to check divisibility by 3. It failed miserably and doubled down on its wrong answer. Even when I coached it, it initially made a mistake in even reading the last symbol.
It finally summarised the method as: either add up the digits or check the last one.
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