Use your Alexa device to play this math game. Alexa will ask you 10 questions in which you have to reply with the greatest common divisor between 2 numbers. See how many you can get right out of 10 questions. (Ex. greatest common divisor between 45 and 99 is 3, whereas the greatest common divisor between 31 and 7 is 1 and the greatest common divisor between 109 and 109 is 109).
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