Online math exercises: Least common multiple (LCM)

What is the greatest common divisor of 54 and 24?

Thus the divisors of 54 are: 1 , 2 , 3 , 6 , 9 , 18 , 27 , 54. Similarly, the divisors of 24 are: 1 , 2 , 3 , 4 , 6 , 8 , 12 , 24. The numbers that these two lists share in common are the common divisors of 54 and 24: 1 , 2 , 3 , 6. The greatest of these is 6. That is, the greatest common divisor of 54 and 24. One writes: gcd ( 54 , 24 ) = 6.

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