One of the keys on a calculator is faulty. When you press it you get a different number. When the following keys are pressed the red numbers appear in the display. Which is the faulty key?
677
204
624
711 538
One of the keys on a calculator is faulty. When you press it you get a different number. When the following keys are pressed the red numbers appear in the display. Which is the faulty key?
677 204 624 711 538
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The faulty key is 7
It produces a 2