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what is the greatest common of 18 27 and 45​

Sagot :

18=2×3×3 (2×3=6, 6×3=18)

27=3×3×3 (3×3=9, 9×3=27)

45=3×3×5 (3×3=9, 9×5=45)

GCF is 3×3=9

Step-by-step explanation:

Prime factorization of 27 and 45 is (3 × 3 × 3) and (3 × 3 × 5) respectively. As visible, 27 and 45 have common prime factors. Hence, the GCF of 27 and 45 is 3 × 3 = 9.