How To Use Greatest common divisor In A Sentence

• If there are several flights that depart from one airport then the greatest common divisor of their flight numbers should be equal to 1.
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• Two positive integers always have a greatest common divisor, even if they have only one common divisor, 1.
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• Euclid's Elements is full of algorithms for geometry, including one to find the greatest common divisor of two numbers.
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